You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Helen Robinson here. I would like to visit New York-JFK to celebrate Christmas festival in Hotel Lobbies, can you book a flight from DCA?

ASSISTANT: Ok, when you want to travel?

USER: My travelling dates are 12/25 and 12/27.

ASSISTANT: I found a flight-1012 with connection 1 and price 100 of Spirit airline. Is it fine for you?

USER: Yes, you can proceed.

ASSISTANT: Ok, your ticket has been done.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us.