You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Due to personal health issue, I couldn't attend my business meeting.So I would like to cancel my recent reservation which is under my name.

ASSISTANT: Ok, can I know your name?

USER: Sure, my name is William Gonzalez.

ASSISTANT: Sorry William, there is no reservation found with your name in our records to cancel.

USER: Ok, no issues.

ASSISTANT: May be, some other had already cancelled your reservation, please check it once.

USER: Sure, thank you for checking.

ASSISTANT: My pleasure.