Hi. I am David Rodriguez.
user
Hello, what can I do for you today?
assistant
 I would like to visit an arts expo at Washington. Can you book me a flight ticket from DEN?
user
Sure, may I know your destination airport code?
assistant
My destination airport code is DCA.
user
Can I know your travelling dates, please?
assistant
I am willing to travel on Oct 25 and return on Oct 27.
user
Do you have any specifications?
assistant
Price should not exceed 200.
user
Thank you for providing all the necessary details, please stand by I will check and revert to you.
assistant
Sure.
user
We have found a connecting flight of AA airline, flight number-1007 and fare 100. Shall I reserve your ticket?
assistant
Please, proceed.
user
Your ticket has been reserved.
assistant
Thank you.
user
Thank you for approaching us.
assistant