Hi.
user
Hello. How can I aid you now?
assistant
  I want to book a flight ticket from BOS to LAS, can you help me with it please?
user
Sure, I am here to help you. May I know your travel dates, please?
assistant
My travelling dates are Feb 26 and Feb 28.
user
Do you have any connection limit?
assistant
I need a direct flight.
user
May I know your class preference?
assistant
         No,  but I need a ticket under normal cost.
user
Do you have any other specifications?
assistant
No.
user
Let me know your name to proceed further.
assistant
     My name is Ruth Green.
user
Ok, please wait for a while.
assistant
Ok.
user
Unfortunately, there are no flights available as per your specifications.
assistant
That's ok, thank you for the response.
user
Thanks for reaching us.
assistant