Hello. I am Margaret Smith.
Hello, how may I aid you?
 Could you please check for a cheaper flight within price 500 in my route to Washington, DC-DCA and book me a flight ticket from Denver, CO-DEN?
Sure, we are happy to help you. May I know your travelling dates?
Sure, I would like to start my journey on 01/29 and end my journey on 01/31.
Ok, please wait for a while.
Sure.
Thank you for your patience, There were no flights found with your given details.
No worries, I will choose another alternative to reach my destination. Thank you for the information.
Thank you for choosing us.