Hi. I am Patrick Martin.
user
Hello. How may I assist you today?
assistant
I am looking for a flight from IAD to IAH, hope you are helping me out.
user
Sure, please provide me your travelling dates.
assistant
Ok, my trip dates are from Sept 20 to Sept 22.
user
Sorry for this inconvenience, I could not find any flight with travelling dates.
assistant
It's ok, thanks for your information and service.
user
My pleasure.
assistant