Hello.
Hello, how may I serve you at this moment?
I am Donald Baker. Can you book a flight ticket from Washington, IAD to Dallas, DFW?
Sure, we are rapturous to help you. Can you please let me know your journey dates?
Thank you. Sure, My travelling dates are from 04/17 to 04/19.
Do you prefer any connection in between journey?
I prefer a connecting flight.
Ok, please stand by, let me check with the airlines and revert to you.
Sure.
We found a AA airlines matching your preferences, and its  cost you only 100,.
Ok, You can proceed with booking.
Your ticket has been reserved with 1002 flight number.
Thank you.
Thank you for reaching us.