Update app.py

app.py

@@ -104,7 +104,7 @@ def load_recommender(paths, start_page=1):
     return 'Corpus Loaded.'
 
 def generate_text(messages, engine='gpt-3.5-turbo', max_tokens=2048, temperature=0.8):
-    response = openai.ChatCompletion.create(
+    response = openai.Completion.create(
         model=engine,
         messages=messages,
         max_tokens=max_tokens,