You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Matthew Campbell. I want to cancel my reservation, due to my health issues. So please help me in the cancellation.

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: We could not find any reservation on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.