You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Karen Young here. I need to cancel my recent reservation because my health condition was too bad.

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, take your own time.

ASSISTANT: Sorry to say, no reservation found on your name. Thank you for reaching us, have a nice day.

USER: It's ok, thank you for checking.