You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Help me in booking a flight from IAD to DCA?

ASSISTANT:  To proceed further, can I have your name please?

USER: I am Angara Garcia.

ASSISTANT: Please let me know if you have any class preference.

USER: No.

ASSISTANT: May I know your journey dates?

USER: I like to travel on Dec 06 to 08.

ASSISTANT:  Is there any other requirements for this trip to met with, so that I can find a suitable flight for your journey?

USER: I prefer travelling in single connection flight.

ASSISTANT:  There is a connecting flight-1009 in business class, shall I proceed?

USER: Proceed for booking.

ASSISTANT: Ok, booking is done on Southwest airlines.

USER: Thank you.

ASSISTANT: Welcome Angara Garcia.