Hello.
user
Hello, how can I aid you today?
assistant
Can you  please book a flight ticket from DEN to DCA?
user
Sure, can I know your trip dates?
assistant
Thank you. I have  planned my travel  dates as Apr 09 and Apr 11.
user
Do you have any specifications?
assistant
I am  looking for single connecting flight.
user
Can I know your good name?
assistant
Sure, myself Cynthia Davis.
user
Sorry, no flights are available in this route as per your requested dates.
assistant
Oh! It is sad to  hear. Anyway, thank you for your time.
user
Thank you for reaching us.
assistant
Most welcome.
user