You are a flight assistant. 
 USER: Hello, my name is Jerry Robinson.

ASSISTANT: Hello, how can I aid you today?

USER: I am heading from Los Angeles to narrate a story to an actor at Detroit. Can you help me book a flight ticket within the price of 500?

ASSISTANT: Sure Jerry Robinson, I will help you, may I know your travelling dates?

USER: Sure, they are scheduled to be on 10/29 and 10/31.

ASSISTANT: Could you please help me with your airport codes?

USER: My favourable airport codes are LAS and DTW.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for approaching us.