You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you now?

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

ASSISTANT: Sure, I will help you with cancellation. May I know your good name?

USER: Thank you for accepting my request. Ok, I am Katherine Nelson.

ASSISTANT: Please wait for a moment.

USER: Ok, take your own time.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for visiting us, we hope see you again.