Hi. I am Nicholas Hall.
user
Hello, how may I aid you at this moment?
assistant
I am looking for a flight from Washington, can you help me in booking the flight ticket from DCA to PHX?
user
Sure, I will help you. Please send your travelling dates.
assistant
My travel dates are from Mar 15th till Mar 17th.
user
Do you have any limitations?
assistant
I need a flight with 1 stop over or direct flight to reach my destination  soon.
user
Sorry, there is no flight available on your travelling dates.
assistant
That's ok, not an issue. Thank you for your help.
user
You are welcome, have a nice day.
assistant