You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what service do you need from us?

USER: My name is James Clark. I want to cancel my recent reservation due to my health issue. Can you help me in cancellation?

ASSISTANT: Sure, I will check the reservation. Please hold on a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, I didn't found any reservation in our database with your name to cancel.

USER: Ok, No issues. Thank you.

ASSISTANT: You are welcome. Have a nice day.