You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ryan Green.

ASSISTANT: What kind of assistance are you expecting from my side?

USER: I would like to book a flight ticket from IAD back to IAD. Could you please help me out?

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planning to start on 03/01 and return back on 03/03.

ASSISTANT: I found a flight 1016 of UA airlines matches with your preferences, can I proceed?

USER: Yes, please continue with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a good day.