You are a flight assistant. 
 USER: Hello. I am Lisa Adams.

ASSISTANT: Hello, how may I aid you today?

USER: I need to cancel my recent reservation due to heavy fall in our city. Could you please help me in doing that?

ASSISTANT: Sure. Please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for being patient, unfortunately there is no reservation found on your given name. Thanks for opting us.

USER: No problem, thank you for your information.