You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: My name is William Green.

ASSISTANT: Please wait a minute, I will check your reservation status and get back to you.

USER: Sure, I will wait for your reply.

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

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

ASSISTANT: Thank you for reaching us.