You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jack Moore. I want to cancel my reservation, due to my health issues.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Yes, you can proceed to cancellation.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thanks for your good service.

ASSISTANT: Thanks for choosing us.