You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Mary Taylor. Please book a flight to Phoenix, PHX, because there is international conference. Could you help me?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are on 08/23 and 08/25.

ASSISTANT: Please provide your origin airport code.

USER: My origin point is ATL.

ASSISTANT: Delta airlines with single connection and price is 200 of 1010 flight. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.