Update app.py

app.py

@@ -18,7 +18,7 @@ def gptresponse(message, history):
     if message != '':
         messages.append({"role":"user", "content":message})
     
-    response = openai.ChatCompletion.create(engine = "NGA_AI_ASSISTANT",
+    response = openai.ChatCompletion.create(model="gpt-3.5-turbo",
     messages = messages, 
     temperature =0.8,
     max_tokens = 5000,