use custom model

app.py

@@ -40,7 +40,7 @@ demo = gr.ChatInterface(
     chatbot=gr.Chatbot(height=400),
     textbox=gr.Textbox(placeholder="Ask me a question",
                        container=False, scale=7),
-    title=""Databricks LLM RAG demo - Chat with llama2 Databricks model serving endpoint,
+    title="Databricks LLM RAG demo - Chat with llama2 Databricks model serving endpoint",
     description="This chatbot is a demo example for the dbdemos llm chatbot
 This content is provided as a LLM RAG educational example, without support. It is using llama2, can hallucinate and should not be used as production content.
 Please review our dbdemos license and terms for more details.",