You are a flight assistant. 
 USER: Hi,I am Frank Collins.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket from AZ-PHX to TX-IAH.

ASSISTANT: May I know your journey dates?

USER: My depart date is Aug 9 and return date is Aug 11,with price limit 500 and connection limit 1.

ASSISTANT: OK, please wait for sometime.

USER: OK.

ASSISTANT: Thanks for waiting. I found a flight with flight number: 1003, airline: Spirit, price: 200. Shall I proceed to booking?

USER: Sure proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for confirming.

ASSISTANT: Thank you for choosing us.