You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Gregory Jackson, I need to schedule my trip to Charlotte for next week. Can you please help me in booking the ticket from LAS to CLT?

ASSISTANT: May I know your desired travel dates please?

USER: I will take-off 02/27 and again I will be return back on 02/29.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Not a big problem, anyhow thank you very much for your help.

ASSISTANT: Thank you for opting us.