Hello, Joseph Clark here.
user
Hello. How can I aid you?
assistant
I want to travel from IAH to DCA. Will you please help me in booking my ticket?
user
Sure, may I know the travelling dates?
assistant
Yes, my travelling dates are from 04/20 to 04/22.
user
Sorry, there is no flight found.
assistant
It's ok, thank you.
user
Thank you.
assistant