Hello. I am John Smith.
user
Hello, how can I aid you?
assistant
I want to book a flight ticket from CO - DEN to MA - BOS, so please help me in booking a flight ticket.
user
May I know your travel dates?
assistant
I want to fly on 02/28 and return in 03/01.
user
Do you have any preference?
assistant
Yes, I need a halt.
user
Sorry, no flights found on your travel dates.
assistant
Not an issue. Thank you.
user
 Thank you for availing us.
assistant