You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I am here to help you. Can I know your name please?

USER: My name is Katherine Brown.

ASSISTANT: Please wait for a while. Sorry, there is no reservation found in your name to cancel.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for approaching us.

USER: Welcome.