Hello.
Hello, how may I aid you?
My name is Richard Allen. I would like to travel from IAD to DCA, could you help me out?
Sure, may I know your planned travel dates please?
My preferable dates are from 10/02 to 10/04.
 There is a flight available on your requested dates from Delta airlines with 1 connecting flight.
Please proceed with the booking.
Your ticket is booked with flight 1011.
Thank you, have a good day.
You are most welcome.