Update app.py

app.py

@@ -63,11 +63,12 @@ def run_conversation(user_prompt, messages, model_option, max_tokens):
 
         for tool_call in tool_calls:
             function_name = tool_call.function.name
-            if function_name not in available_functions:
-                return "Invalid tool provided."
             function_to_call = available_functions[function_name]
             function_args = json.loads(tool_call.function.arguments)
-            function_response = function_to_call(**function_args)
+            if function_name not in available_functions:
+                function_response = "invalid tool"
+            else:
+                function_response = function_to_call(**function_args)
             messages.append(
                 {
                     "tool_call_id": tool_call.id,