You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please cancelling my recent reservation with the name Lisa White?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please wait for couple of minutes.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform you that, no reservation was found on your name to cancel.

USER: Its ok, thank you.

ASSISTANT: Thank you for availing us.