You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER:  I am Charles Rodriguez. I would like to book a flight ticket from SFO to JFK.

ASSISTANT: Sure, can I know your preferable dates?

USER: I am starting on 12/20 and return back on 12/22.

ASSISTANT: I found a flight 1011 of Spirit airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you, have a good day.