You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, may I know your good name please?

USER: My name is Susan Hall.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

USER: Thanks.

ASSISTANT: You are welcome.