You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Elizabeth Hill. I am planning to visit my cousin's home from IAD. Can you please help me out?

ASSISTANT: Sure, may I know your destination airport code?

USER: My destination airport code is DCA.

ASSISTANT: Please share your travel dates, Hill.

USER: I would like to travel on 05/04 and return back on 05/06.

ASSISTANT: Spirit airlines is having a flight with ticket cost of 100, shall I proceed booking?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been booked with flight-1006, have a safe journey.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.