You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: I'm Andrew Thomas.

ASSISTANT: How can I help you?

USER: I want to cancel my current reservation due to health issue.

ASSISTANT: Sure, please give me some time to check you details?

USER: Ok.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: That's fine.

ASSISTANT: Do you want any other information please?

USER: Thank you for helping me.

ASSISTANT: Thank you and have a nice day.