You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I am Michael Williams. I want to cancel my recent reservation, due to health issue. Can you help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thanks for opting us.