You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Kevin Clark, I want to cancel my reservation due to health issues.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your given name. Would you like me to cancel?

USER: Yes, please.

ASSISTANT: Ok, your reservation has been cancelled.

USER: Thank you.

ASSISTANT: Thanks for choosing us.