You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I serve you the best today?

USER: I want to book the flight ticket from DFW to IAD. Can you please help me?

ASSISTANT: Sure, I am glad to help you. May I know when you are willing to travel?

USER: Dates are Jan 17 and Jan 19.

ASSISTANT: Do you prefer either connecting flight or direct flight?

USER: Connected flight required.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: There is an airline called Southwest of flight 1020 in an economy class with single connection. Can I confirm your booking?

USER: Book it.

ASSISTANT: May I know your name please?

USER: Samuel White here.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for booking.

ASSISTANT: Thank you for availing us.