You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Richard Anderson. I want to book a flight ticket from PHX to DCA. Could you help me in booking?

ASSISTANT: Sure, can I know your preferable dates?

USER: My preferable dates are from 06/29 to 07/01.

ASSISTANT: I found a flight 1014 of Delta airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a good day.