Hello, I am Paul walker.
user
How may I serve you at this moment?
assistant
I want to book a flight ticket from Washington, DC - IAD to Denver, CO - DEN. Can you help me?
user
Sure, I can help you. Dates Please?
assistant
My trip dates are from 04/30 to 05/02.
user
No flights are available on those dates.
assistant
It's ok, not a problem. Thank you for your information.
user
Thanks for picking us, have a nice day.
assistant