You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to travel from IAD to DFW, can you please help me in flight booking?

ASSISTANT: Sure, I am glad to help you. May I know your trip dates?

USER: I will start on June 13, return on June 15.

ASSISTANT: May I know your name?

USER: My name is Katherine Collins.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any preferences?

USER: I need an economy class flight ticket.

ASSISTANT: Here, there is a flight with 1 connection in Hawaiian airlines and price is 100. Shall I book?

USER: Ok, proceed to booking.

ASSISTANT: Ok, your ticket has been booked with the flight 1012 which is economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.