You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Jones.

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, please wait for a while let me check for the previous reservation status on your name.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry Jones, there is no active reservation found under your name in our database to cancel it.

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

ASSISTANT: Thank you for reaching us.