Hello, I am Joseph Lee.
user
Hello, how may I help you at this moment?
assistant
I would like to go to a event in Washington, so could you please book a ticket for me?
user
Sure, I will help you. Please send your travelling dates.
assistant
Sure, I would like to go on 04/06 and return back on 04/08.
user
Noted. Can I have your nearby airport codes?
assistant
My source and destination airport codes are PHL and IAD.
user
Please wait for a while, I will check the availability.
assistant
Ok, ensure it is a single connecting flight.
user
Sorry, there is no flight available on your requested dates.
assistant
That's ok, thank you for checking.
user
You are welcome, have a nice day.
assistant