You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to cancel my reservation because of heath issue. Can you please cancel my ticket?

ASSISTANT: Sure, can I know your name please?

USER: Yes, I am Ruth Nelson.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

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

USER: Not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.