Hi. I am David Scott.
user
Hello, how  may I help you?
assistant
I would like to travel in a less expensive flight. So search for a flight with in price 200.
user
Sure, can I know your travelling dates?
assistant
12/29 and 12/31 are my travelling dates.
user
Ok, let me know your origin and destination airport codes?
assistant
IAH and DEN are my nearest airport codes.
user
Sorry, there are no flights found on given dates.
assistant
No issue. Thank you.
user
Thank you for reaching us.
assistant