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