You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is David Allen. I would like to travel from IAD to IAH, could you help me out?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates are from 10/01 to 10/03.

ASSISTANT: There is a flight with connection limit 2 and fare 200, shall I proceed for booking?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked, flight number 1000.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.