You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Lee.

ASSISTANT: How can I help you?

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

ASSISTANT: Yes. I can do that for you. Give me a moment.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's fine.

ASSISTANT: Thank you for consulting our agency.

USER: Thank you for your service.