You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you?

USER: Catherine Hall here, please cancel my reservation which I have done previously.

ASSISTANT: Sure, may I know your good name? Thank you for providing your name, please hold on.

USER: Sure, I will wait for your response.

ASSISTANT: No reservation found on your name.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for choosing us, have a nice day.