Hi.
user
Hello, How may I serve you?
assistant
I am Brandon Parker. I want to book  a flight ticket to attend an event from DC-DCA to CO-DEN. Can you help me?
user
Sure, may I know your travelling dates?
assistant
03/22 and 03/24 are my travelling dates.
user
Please wait for a minute.
assistant
Ok.
user
There is no flight found with your requirements.
assistant
No issue. Thank you.
user
Thanks for availing us.
assistant