You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: Sure, I will help you with the flight ticket cancellation.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, I am Charles Clark.

ASSISTANT: Thanks for waiting Charles. But I am sorry to say that there is no flight reservation on your name to cancel it.

USER: Ok, not a problem. Thank you for information.

ASSISTANT: Thanks for contacting us.