You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Debra Perez. I would like to book a flight ticket from SEA to DCA. Could you help me out?

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planing to start on 04/21 and return back on 04/23 in a direct flight.

ASSISTANT: I found a flight 1005 of AA 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.