You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christopher Johnson.

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: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your reply.

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

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

ASSISTANT: Thank you for approaching us.