Update app.py

app.py

@@ -36,7 +36,7 @@ def CustomChatGPT(preferences, messages):
         model="gpt-3.5-turbo",
         messages=messages
     )
-    ChatGPT_reply = response.choices[0].message.content
+    ChatGPT_reply = response["choices"][0]["message"]["content"]
     messages.append({"role": "assistant", "content": ChatGPT_reply})
     return ChatGPT_reply, messages