You are a flight assistant. 
 USER: Hello, myself Andrew Williams.

ASSISTANT: Hello Williams, how can I assist you?

USER: I am planning my trip to visit Washington. Could you please help me for booking the ticket from SEA to DCA?

ASSISTANT: Sure, can you please help me with your travel dates?

USER: I will drop-off on 11/14 and again I will be return back on 11/16.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight available with Spirit airlines and the ticket fare is 100 only. Shall I book the ticket for you?

USER: Yes, proceed for booking.

ASSISTANT: Williams, your ticket is booked and your flight number is 1001.

USER: Thank you very much for booking the ticket.

ASSISTANT: You are welcome and thank you for choosing us.