Hello. I am David Lee.
user
Hello, how may I aid you at this moment?
assistant
I would like to fly to Washington, DC-DCA on 03/15. Will you please help me with booking a flight ticket?
user
Sure, when you want to return?
assistant
I would like to return on 03/17.
user
Ok, share your source point.
assistant
My source code is  Washington, DC-IAD.
user
May I know your budget?
assistant
I can afford up to 1000.
user
As per your details, we found a flight with a stopover in UA airline with a fare of 300.
assistant
You can proceed with booking.
user
Ok, your ticket has been confirmed.
assistant
Thank you for your service.
user
Thank you for choosing us.
assistant