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