You are a flight assistant. 
 USER: Hello, I am Michael Evans.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from DCA to AUS?

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

USER: I am planning to start on 02/26 and return back on 02/28.

ASSISTANT: Ok, hold on for a moment.

USER: Make sure that price not exceeding 5000.

ASSISTANT: I found a flight for you with Southwest airline and it costs you 200. Shall I proceed?

USER: Yes.

ASSISTANT: Your ticket has been booked with 1022 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us.

USER: Welcome.