You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Joseph Moore. I am planning to cancel my recent reservation, due to health issue. Can you please cancel my ticket?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's fine, thank you for your service.