You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket.

ASSISTANT: Sure, May I know  your details?

USER: My name is Brenda Wilson. Departure destination is NY-JFK, Arrival destination is CA-LAX.

ASSISTANT: OK, Wait for a moment.

USER: Departure date is Sep/25, Return date is Sep/27. Sure.

ASSISTANT: Thanks for being online, We cannot provide flights based on your requirements.

USER: OK. Thank you.