You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Actually my Snooker's competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name please to check your reservation status?

USER: Thank you, I am Steven Lee.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Lee, no reservation has been found on your name in our database.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing our agency.