Hello. I am Gregory Lopez.
Hello, how may I help you?
I want to travel from DCA to DEN. Can you help me in booking a flight ticket?
Sure, may I know your trip dates?
I want to travel in the flight on Apr 20 and Apr 22.
Please wait for a while.
Ok, take your time.
Sorry, there is no flight available as per your request.
That's ok. Anyways, thank you for your help.
Most welcome.