You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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 oblige to help you.

USER: Thank you.

ASSISTANT: May I know your name to check your previous reservation?

USER: Sure, I am Elizabeth Campbell.

ASSISTANT: Please be on hold to check.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation with your name in our records.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your valuable information.

ASSISTANT: Welcome.