You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Jerry Brown. I want to cancel my reservation, due to health issues.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: I found reservation with your name, shall I proceed for cancellation?

USER: Sure, you can proceed to cancellation.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.