Update chatbot.py

chatbot.py

@@ -165,7 +165,7 @@ def chatbot(input, state):
             model="gpt-3.5-turbo",
             messages=messages
         )
-        reply = response.choices[0].message['content']
+        reply = response.choices[0].message.content
         messages.append({"role": "assistant", "content": reply})
         
         conversation = ""