Hi.
user
Hello, how may I assist you?
assistant
I am looking for a flight from IAD to JFK, can you help me out?
user
Sure, help me with the trip dates?
assistant
Sure, my trip dates are from May 27th till May 29th.
user
May I know your name please?
assistant
Myself John Mitchell.
user
Do you have any preferences?
assistant
I prefer to travel in business class flight.
user
Sorry, no flights were available at this moment.
assistant
That's ok, not an issue.  Thank you.
user
Thank you for reaching us.
assistant