You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want cancel my reservation as I am sick.

ASSISTANT: Sure, I can help you with that. Can I know your name?

USER: My name is Raymond Hall.

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

USER: Ok, thank you for your help.

ASSISTANT: You are welcome.