You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rebecca Hall, here.

ASSISTANT: How may I help you Rebecca?

USER: I want to visit National  hall in DCA, so I want to book a ticket.

ASSISTANT: Sure, can you tell me your nearest airport?

USER: I am travelling from PHX, dates are from 09/18  to 09/20.

ASSISTANT: Ok. I found a flight for you. Flight ticket price is 200 with 1 connection.

USER: Confirm my ticket.

ASSISTANT: Sure. Your ticket is confirmed.

USER: Thanks for helping me.

ASSISTANT: Most welcome.