You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER:  I want to visit museum in  Washington,DC-IAD.

ASSISTANT: Definitely.

USER: Can you book a ticket?

ASSISTANT: Please provide departure location.

USER: I will depart from Phoenix,AZ-PHX. My tour dates are 12/28 and 12/30.

ASSISTANT: May I know your name ?

USER: I am Gary Allen.

ASSISTANT: I would like to know ticket price limit, connections.

USER: I need a single connection flight with price 200.

ASSISTANT: I regret there is no flight with your requirements.

USER: Thank you.

ASSISTANT: Thanks.