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