You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to cancel my reservation due to some health issues, so please help me in cancellation.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name please?

USER: Sure, I am Nancy Mitchell.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing us.