You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am George Wright. I want to book a ticket from PHL to LAX to attend seminar, can you help me in booking?

ASSISTANT: Sure. May I know your travel dates please?

USER: I am departing on 10/24 and return on 10/26.

ASSISTANT: Thanks for waiting George.

USER: That's ok.

ASSISTANT: But I am sorry to say that presently there are no flights available.

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

ASSISTANT: Thank you.