You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Catherine Green.

ASSISTANT: How can I assist you?

USER: I need to book a flight ticket from IAD to SEA, can you please help me for booking?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I would like to travel on 12/26 to return on 12/28.

ASSISTANT: How much you can pay for this ticket?

USER: I can pay up to 200.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your time, we found a flight with number 1006 and airline Southwest at a price of 100 with 1 connection. Shall I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Sure, your booking is done.

USER: Thanks for your information.

ASSISTANT: Thank you for opting us, have a nice day.