You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Donald Baker. Can you book a flight ticket from Washington, IAD to Dallas, DFW?

ASSISTANT: Sure, we are rapturous to help you. Can you please let me know your journey dates?

USER: Thank you. Sure, My travelling dates are from 04/17 to 04/19.

ASSISTANT: Do you prefer any connection in between journey?

USER: I prefer a connecting flight.

ASSISTANT: Ok, please stand by, let me check with the airlines and revert to you.

USER: Sure.

ASSISTANT: We found a AA airlines matching your preferences, and its  cost you only 100,.

USER: Ok, You can proceed with booking.

ASSISTANT: Your ticket has been reserved with 1002 flight number.

USER: Thank you.

ASSISTANT: Thank you for reaching us.