Update app.py

app.py

@@ -22,9 +22,7 @@ with gr.Blocks() as app:
     def reset_memory(session_data_fn):
         messages_archived = session_data_fn[0]
         if(len(messages_archived)>=21):
-            messages_archived = [
-            {"role": "system", "content": pre_text}
-            ]      
+            messages_archived = messages_archived[0:1] + messages_archived[3:]     
             session_data_fn[0] = messages_archived
         return session_data_fn