You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Kimberley Nelson here.

ASSISTANT: Yes, Nelson.

USER: I just want to cancel my existing reservation due to some health issue.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.