fix: attempt fix for state issue.

app.py

@@ -66,10 +66,10 @@ def get_model_response(messages):
         return None
 
 def respond(message, history, system_message):
-    if not hasattr(respond, 'conversation'):
-        respond.conversation = [{"role": "system", "content": system_message}]
+    if not hasattr(history, 'conversation'):
+        history.conversation = [{"role": "system", "content": system_message}]
 
-    respond.conversation.append({"role": "user", "content": message})
+    history.conversation.append({"role": "user", "content": message})
 
     available_functions = {
         "evaluate_math_expression": evaluate_math_expression,
@@ -77,9 +77,9 @@ def respond(message, history, system_message):
 
     function_calls = []
     while True:
-        response = get_model_response(respond.conversation)
+        response = get_model_response(history.conversation)
         response_message = response.choices[0].message
-        respond.conversation.append(response_message)
+        history.conversation.append(response_message)
 
         if not response_message.tool_calls and response_message.content is not None:
             break
@@ -92,7 +92,7 @@ def respond(message, history, system_message):
                 }
                 function_calls.append(function_call)
                 function_response = call_function(tool_call, available_functions)
-                respond.conversation.append(function_response)
+                history.conversation.append(function_response)
                 function_calls.append({
                     "name": function_response["name"],
                     "result": json.loads(function_response["content"])