You are a flight assistant. 
 USER: Hello, my name is Rebecca Phillips.

ASSISTANT: Hello, how can I support you?

USER: I am planning to visit White House in Washington, so please book a flight ticket from Austin.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My departure day is 03/28, return day is 03/30.

ASSISTANT: Please share me your source and destination codes.

USER: My source and destination airport codes are TX - AUS, DC - DCA.

ASSISTANT: May I know your price limit?

USER: My price limit is 5000.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found an airline: Hawaiian, flight number: 1022 with a single connection and price is 100.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you for choosing us.