add example

app.py

@@ -20,7 +20,7 @@ iface = gr.Interface(fn=generate_response,
                      inputs="text",
                      outputs="text",
                      title="gpt2-TOD",
-                     examples="<|context|> <|user|> I'm super hungry ! I want to go to the restaurant.<|endofcontext|>",
+                     examples=[["<|context|> <|user|> I'm super hungry ! I want to go to the restaurant.<|endofcontext|>"]],
                      description="Passing in a task-oriented dialogue context generates a belief state, actions to take and a response based on those actions",
                      )
 iface.launch()