You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from IAD to DEN. Could you help me in booking?

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

USER: My travelling dates are from Jan 18 - 20.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any time concern?

USER: No.

ASSISTANT: Do you need any airline preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: Sarah Garcia.

ASSISTANT: Southwest Airlines is providing connecting flight with the ticket fare of 900 and depart time is 5:00 hours, arrival time is 19:00 hours, Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been confirmed by flight number 1002 and an business class.

USER: Thank you for helping me.

ASSISTANT: Thanks for choosing us.