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