You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mary Young here.

ASSISTANT: How may I help you?

USER: Reserve a flight ticket for me that is from IAD to DFW.

ASSISTANT: Sure, could you please let me know your trip dates?

USER: My travel dates are 11/30 to 12/02.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Flight-1018 of Southwest airlines is available, shall I proceed?

USER: Sure.

ASSISTANT: Ok, your booking is done.

USER: Thanks for booking my flight.

ASSISTANT: Welcome.