Hello.
user
Hello, how may I help you?
assistant
I am Kevin Clark, want to celebrate my birthday in Boston BOS. Can you check once is there any flight available from Denver DEN?
user
Sure, may I know your trip dates please?
assistant
My travel dates are from 08/28 to 08/30.
user
Please wait for a while, I will check the availability.
assistant
Sure.
user
Sorry to inform you, there is no flight available as per your request.
assistant
That's fine, thank you.
user
Most welcome.
assistant