You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you today?

USER: I am Cynthia Campbell, I want to book a flight with price limit 200.

ASSISTANT: Sure, May I know your journey dates?

USER: Sure, my departure from 05/02 and my return on 05/04.

ASSISTANT: Ok, to book a flight I need your airport codes.

USER: I am planning to spend my weekend in Hilton Hotel in Austin, TX - AUS and my origin from CA - OAK.

ASSISTANT: Sure, wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is a flight with airline AA and flight number 1007 with price 200. Shall I proceed?

USER: Ok, confirm my booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you, for your service.

ASSISTANT: Thank you have a safe journey.