You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: I have already reserved my ticket, but right now I want to cancel that reservation. Can you help me to cancel reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Joseph Carter.

ASSISTANT: OK Joseph, please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on you name Joseph.

USER: OK, no issues. Thank you for your wonderful service.