diff --git a/pyproject.toml b/pyproject.toml
index dee6cea..c9c27ff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,14 +8,14 @@ version = "0.2.2"
 authors = [
   { name="Emery Berger", email="emery.berger@gmail.com" },
 ]
-dependencies = ["llm_utils==0.2.4", "openai>=1.6.1"]
+dependencies = ["llm_utils>=0.2.6", "openai>=1.6.1", "rich>=13.7.0"]
 description = "AI-assisted debugging. Uses AI to answer 'why'."
 readme = "README.md"
 requires-python = ">=3.7"
 classifiers = [
-    "Programming Language :: Python :: 3",
-    "License :: OSI Approved :: Apache Software License",
-    "Operating System :: OS Independent",
+  "Programming Language :: Python :: 3",
+  "License :: OSI Approved :: Apache Software License",
+  "Operating System :: OS Independent",
 ]
 
 [project.scripts]
diff --git a/src/chatdbg/chatdbg.py b/src/chatdbg/chatdbg.py
index 120b295..a507867 100644
--- a/src/chatdbg/chatdbg.py
+++ b/src/chatdbg/chatdbg.py
@@ -56,4 +56,4 @@ def main():
         sys.exit(2)
 
     pdb.Pdb = ChatDBG
-    pdb.main()
+    pdb.main()
\ No newline at end of file
diff --git a/src/chatdbg/chatdbg_lldb.py b/src/chatdbg/chatdbg_lldb.py
index 5275a4c..d014d24 100644
--- a/src/chatdbg/chatdbg_lldb.py
+++ b/src/chatdbg/chatdbg_lldb.py
@@ -7,9 +7,14 @@
 import json
 
 import llm_utils
+import subprocess
+import openai
+
 
 sys.path.append(os.path.abspath(pathlib.Path(__file__).parent.resolve()))
 import chatdbg_utils
+import conversation
+
 
 # The file produced by the panic handler if the Rust program is using the chatdbg crate.
 rust_panic_log_filename = "panic_log.txt"
@@ -295,7 +300,7 @@ def print_test(
     addresses = {}
     for var in frame.get_all_variables():
         # Returns python dictionary for each variable, converts to JSON
-        variable = helper_result(
+        variable = _val_to_json(
             debugger, command, result, internal_dict, var, recurse_max, addresses
         )
         js = json.dumps(variable, indent=4)
@@ -308,7 +313,7 @@ def print_test(
     return
 
 
-def helper_result(
+def _val_to_json(
     debugger: lldb.SBDebugger,
     command: str,
     result: str,
@@ -339,7 +344,7 @@ def helper_result(
                             value += "->"
                             deref_val = deref_val.Dereference()
                         elif len(deref_val.GetType().get_fields_array()) > 0:
-                            value = helper_result(
+                            value = _val_to_json(
                                 debugger,
                                 command,
                                 result,
@@ -368,7 +373,7 @@ def helper_result(
         for i in range(var.GetNumChildren()):
             f = var.GetChildAtIndex(i)
             fields.append(
-                helper_result(
+                _val_to_json(
                     debugger,
                     command,
                     result,
@@ -382,3 +387,63 @@ def helper_result(
     else:
         json["value"] = str(var)[str(var).find("= ") + 2 :]
     return json
+
+
+_DEFAULT_FALLBACK_MODELS = ["gpt-4", "gpt-3.5-turbo"]
+
+
+@lldb.command("converse")
+def converse(
+    debugger: lldb.SBDebugger,
+    command: str,
+    result: str,
+    internal_dict: dict,
+) -> None:
+    # Perform typical "why" checks
+    # Check if there is debug info.
+    if not is_debug_build(debugger, command, result, internal_dict):
+        print(
+            "Your program must be compiled with debug information (`-g`) to use `converse`."
+        )
+        return
+    # Check if program is attached to a debugger.
+    if not get_target():
+        print("Must be attached to a program to ask `converse`.")
+        return
+    # Check if code has been run before executing the `why` command.
+    thread = get_thread()
+    if not thread:
+        print("Must run the code first to ask `converse`.")
+        return
+    # Check why code stopped running.
+    if thread.GetStopReason() == lldb.eStopReasonBreakpoint:
+        # Check if execution stopped at a breakpoint or an error.
+        print("Execution stopped at a breakpoint, not an error.")
+        return
+
+    args = chatdbg_utils.use_argparse(command.split())
+
+    try:
+        client = openai.OpenAI(timeout=args.timeout)
+    except openai.OpenAIError:
+        print("You need an OpenAI key to use this tool.")
+        print("You can get a key here: https://platform.openai.com/api-keys")
+        print("Set the environment variable OPENAI_API_KEY to your key value.")
+        sys.exit(1)
+
+    the_prompt = buildPrompt(debugger)
+
+
+    if args.show_prompt:
+        print("===================== Prompt =====================")
+        conversation.converse(client, args, the_prompt[1])
+        print("==================================================")
+        sys.exit(0)
+
+    print("==================================================")
+    print("ChatDBG")
+    print("==================================================")
+    print(conversation.converse(client, args, the_prompt[1]))
+    print("==================================================")
+
+    sys.exit(0)
diff --git a/src/chatdbg/chatdbg_utils.py b/src/chatdbg/chatdbg_utils.py
index 9b7a910..41d56f6 100644
--- a/src/chatdbg/chatdbg_utils.py
+++ b/src/chatdbg/chatdbg_utils.py
@@ -5,12 +5,104 @@
 
 import llm_utils
 
+import argparse
+from typing import Any, Optional
+from rich.console import Console
+
+class RichArgParser(argparse.ArgumentParser):
+    def __init__(self, *args: Any, **kwargs: Any):
+        self.console = Console(highlight=False)
+        super().__init__(*args, **kwargs)
+
+    def _print_message(self, message: Optional[str], file: Any = None) -> None:
+        if message:
+            self.console.print(message)
+
+class ChatDBGArgumentFormatter(argparse.HelpFormatter):
+    # RawDescriptionHelpFormatter.
+    def _fill_text(self, text, width, indent):
+        return "".join(indent + line for line in text.splitlines(keepends=True))
+
+    # RawTextHelpFormatter.
+    def _split_lines(self, text, width):
+        return text.splitlines()
+
+    # ArgumentDefaultsHelpFormatter.
+    # Ignore if help message is multiline.
+    def _get_help_string(self, action):
+        help = action.help
+        if "\n" not in help and "%(default)" not in action.help:
+            if action.default is not argparse.SUPPRESS:
+                defaulting_nargs = [argparse.OPTIONAL, argparse.ZERO_OR_MORE]
+                if action.option_strings or action.nargs in defaulting_nargs:
+                    help += " (default: %(default)s)"
+        return help
+
+def use_argparse(full_command):
+    description = textwrap.dedent(
+            rf"""
+                [b]ChatDBG[/b]: A Python debugger that uses AI to tell you `why`.
+                [blue][link=https://github.com/plasma-umass/ChatDBG]https://github.com/plasma-umass/ChatDBG[/link][/blue]
+
+                usage:
+                [b]chatdbg [-c command] ... [-m module | pyfile] [arg] ...[/b]
+
+                Debug the Python program given by pyfile. Alternatively,
+                an executable module or package to debug can be specified using
+                the -m switch.
+
+                Initial commands are read from .pdbrc files in your home directory
+                and in the current directory, if they exist.  Commands supplied with
+                -c are executed after commands from .pdbrc files.
+
+                To let the script run until an exception occurs, use "-c continue".
+                You can then type `why` to get an explanation of the root cause of
+                the exception, along with a suggested fix. NOTE: you must have an
+                OpenAI key saved as the environment variable OPENAI_API_KEY.
+                You can get a key here: https://openai.com/api/
+
+                To let the script run up to a given line X in the debugged file, use
+                "-c 'until X'".
+            """
+    ).strip()
+    parser = RichArgParser(
+        prog="chatdbg",
+        usage=argparse.SUPPRESS,
+        description=description,
+        formatter_class=ChatDBGArgumentFormatter
+    )
+    parser.add_argument(
+        "--llm",
+        type=str,
+        default="gpt-4-turbo-preview",
+        help=textwrap.dedent(
+            """
+                the language model to use, e.g., 'gpt-3.5-turbo' or 'gpt-4'
+                the default mode tries gpt-4-turbo-preview and falls back to gpt-4
+            """
+        ).strip(),
+    )
+    parser.add_argument(
+        "-p",
+        "--show-prompt",
+        action="store_true",
+        help="when enabled, only print prompt and exit (for debugging purposes)",
+    )
+    parser.add_argument(
+        "--timeout",
+        type=int,
+        default=60,
+        help="the timeout for API calls in seconds",
+    )
+
+    args = parser.parse_args(full_command)
+    return args
 
 def get_model() -> str:
-    all_models = ["gpt-4", "gpt-3.5-turbo"]
+    all_models = ["gpt-4-turbo-preview", "gpt-4", "gpt-3.5-turbo"]
 
     if not "OPENAI_API_MODEL" in os.environ:
-        model = "gpt-4"
+        model = "gpt-4-turbo-preview"
     else:
         model = os.environ["OPENAI_API_MODEL"]
         if model not in all_models:
diff --git a/src/chatdbg/conversation/__init__.py b/src/chatdbg/conversation/__init__.py
new file mode 100644
index 0000000..de19991
--- /dev/null
+++ b/src/chatdbg/conversation/__init__.py
@@ -0,0 +1,82 @@
+import textwrap
+
+import llm_utils
+
+from . import functions
+
+
+def get_truncated_error_message(args, diagnostic) -> str:
+    """
+    Alternate taking front and back lines until the maximum number of tokens.
+    """
+    front: list[str] = []
+    back: list[str] = []
+    diagnostic_lines = diagnostic.splitlines()
+    n = len(diagnostic_lines)
+
+    def build_diagnostic_string():
+        return "\n".join(front) + "\n\n[...]\n\n" + "\n".join(reversed(back)) + "\n"
+
+    for i in range(n):
+        if i % 2 == 0:
+            line = diagnostic_lines[i // 2]
+            list = front
+        else:
+            line = diagnostic_lines[n - i // 2 - 1]
+            list = back
+        list.append(line)
+        count = llm_utils.count_tokens(args.llm, build_diagnostic_string())
+        if count > args.max_error_tokens:
+            list.pop()
+            break
+    return build_diagnostic_string()
+
+
+def converse(client, args, diagnostic):
+    fns = functions.Functions(args)
+    available_functions_names = [fn["function"]["name"] for fn in fns.as_tools()]
+    system_message = textwrap.dedent(
+        f"""
+            You are an assistant debugger. The user is having an issue with their code, and you are trying to help them.
+            A few functions exist to help with this process, namely: {", ".join(available_functions_names)}.
+            Don't hesitate to call as many functions as needed to give the best possible answer.
+            Once you have identified the problem, explain the diagnostic and provide a way to fix the issue if you can.
+        """
+    ).strip()
+    user_message = f"Here is my error message:\n\n```\n{get_truncated_error_message(args, diagnostic)}\n```\n\nWhat's the problem?"
+    conversation = [
+        {"role": "system", "content": system_message},
+        {"role": "user", "content": user_message},
+    ]
+
+    if args.show_prompt:
+        print("System message:", system_message)
+        print("User message:", user_message)
+        return
+
+    while True:
+        completion = client.chat.completions.create(
+            model=args.llm,
+            messages=conversation,
+            tools=fns.as_tools(),
+        )
+
+        choice = completion.choices[0]
+        if choice.finish_reason == "tool_calls":
+            for tool_call in choice.message.tool_calls:
+                function_response = fns.dispatch(tool_call.function)
+                if function_response:
+                    conversation.append(choice.message)
+                    conversation.append(
+                        {
+                            "tool_call_id": tool_call.id,
+                            "role": "tool",
+                            "name": tool_call.function.name,
+                            "content": function_response,
+                        }
+                    )
+        elif choice.finish_reason == "stop":
+            text = completion.choices[0].message.content
+            return llm_utils.word_wrap_except_code_blocks(text)
+        else:
+            print(f"Not found: {choice.finish_reason}.")
diff --git a/src/chatdbg/conversation/functions.py b/src/chatdbg/conversation/functions.py
new file mode 100644
index 0000000..db2100c
--- /dev/null
+++ b/src/chatdbg/conversation/functions.py
@@ -0,0 +1,56 @@
+import json
+import os
+from typing import Optional
+
+import llm_utils
+
+
+class Functions:
+    def __init__(self, args):
+        self.args = args
+
+    def as_tools(self):
+        return [
+            {"type": "function", "function": schema}
+            for schema in [self.get_code_surrounding_schema()]
+        ]
+
+    def dispatch(self, function_call) -> Optional[str]:
+        arguments = json.loads(function_call.arguments)
+        print(
+            f"Calling: {function_call.name}({', '.join([f'{k}={v}' for k, v in arguments.items()])})"
+        )
+        try:
+            if function_call.name == "get_code_surrounding":
+                return self.get_code_surrounding(
+                    arguments["filename"], arguments["lineno"]
+                )
+            else:
+                raise ValueError("No such function.")
+        except Exception as e:
+            print(e)
+        return None
+
+    def get_code_surrounding_schema(self):
+        return {
+            "name": "get_code_surrounding",
+            "description": "Returns the code in the given file surrounding and including the provided line number.",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "filename": {
+                        "type": "string",
+                        "description": "The filename to read from.",
+                    },
+                    "lineno": {
+                        "type": "integer",
+                        "description": "The line number to focus on. Some context before and after that line will be provided.",
+                    },
+                },
+                "required": ["filename", "lineno"],
+            },
+        }
+
+    def get_code_surrounding(self, filename: str, lineno: int) -> str:
+        (lines, first) = llm_utils.read_lines(filename, lineno - 7, lineno + 3)
+        return llm_utils.number_group_of_lines(lines, first)
diff --git a/test/a.out b/test/a.out
new file mode 100755
index 0000000..ebeda25
Binary files /dev/null and b/test/a.out differ