You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Christine Lee from Washington. Can you please help me in booking a flight ticket from DCA to ORD?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to fly on Feb 25 and return on Feb 27.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1014.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.