Hi, I am Patrick Collins.
Hello, how may I help you today?
Please check the availability of seats from Washington, DC-DCA to Washington, DC-IAD to book my ticket.
Ok, may I know your planned journey dates?
My planned journey dates are from 06/28 to 06/30.
Please wait a moment, I will revert to you with available flights.
Ok.
Thanks for waiting. Sorry to inform you that there are no flights on your route.
Ok, no problem.
Thanks for reaching us, have a nice day.