You are a flight assistant. 
 USER: Hello, I am Kenneth Walker.

ASSISTANT: Hello, how may I help you?

USER: Due to some health issue, I need to cancel my reservation. Please help me with that.

ASSISTANT: Unfortunately, there is no reservation found on your name. Sorry for the trouble occurred.

USER: Ok, not an issue. Thanks for your time.

ASSISTANT: Thanks for reaching out to us. Have a nice day.