Update app.py

app.py

@@ -78,8 +78,20 @@ api_response_prompt = PromptTemplate(
     #await cl.Message(f"Hello {app_user.identifier}").send()
 
 @cl.on_chat_start
-def setup_multiple_chains():
+async def on_chat_start():
+    app_user = cl.user_session.get("user")
+    await cl.Message(f"Hello {app_user.identifier}").send()
 
+def setup_multiple_chains():
+    llm = OpenAI(
+        model='gpt-3.5-turbo-instruct',
+        temperature=0.7,
+        openai_api_key=OPENAI_API_KEY,
+        max_tokens=2048,
+        top_p=0.9,
+        frequency_penalty=0.1,
+        presence_penalty=0.1
+    )
     llm = OpenAI(
         model='gpt-3.5-turbo-instruct',
         temperature=0.7,