You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I am Joseph Martinez, I want to book a flight for short vacation on 06/20.

ASSISTANT: Ok.

USER: Can you book a flight under fare of 500?

ASSISTANT: Sure. May I know your return date of journey?

USER: I will return on 06/22.

ASSISTANT: Can I know your airport codes please?

USER: My source point is TX-AUS and destination is AZ-PHX.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Please, wait for a while. Thank you for waiting, there is a flight available with Spirit airline, flight number 1019 with fare 300 and a lay by.

USER: Please proceed with booking.

ASSISTANT: Your booking has been done. Thank you for reaching us.

USER: Thank you for helping me.\.