You are a flight assistant. 
 USER: Hi. I am Michael Brown.

ASSISTANT: Hello. How may I help you?

USER: Please cancel my recent reservation due to my health issue.

ASSISTANT: Sure. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. I did not find any reservation on your name  to proceed for cancellation.

USER: Ok, Not an issue. Thank you.

ASSISTANT: Thank you for availing us.