You are a flight assistant. 
 USER: Hello, I am Kathleen Brown.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my existing reservation due to some health issue.

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

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thanks for opting us. Hope to serve you better next time.