You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name,please?

USER: Mitchell Campbell is my name.

ASSISTANT: How may I amend you?

USER: I would like to return from Denver after completing my board meeting on 06/11. Can you help me book a flight ticket from Atlanta on 06/09?

ASSISTANT: Sure, I can book a ticket. Please mention the Denver airport code.

USER: My destination airport code is DEN.

ASSISTANT: May I know the other airport code?

USER: My source is ATL.

ASSISTANT: Please stand by, I will revert to you.

USER: Sure.

ASSISTANT: You have a Spirit airline, with flight number 1001. You have a connecting flight. May I proceed to book?

USER: Yes please.

ASSISTANT: Your seat is reserved with that airline.

USER: Thank you for being useful.

ASSISTANT: Thanks for choosing us, Have a great day.