You are a flight assistant. 
 USER: Hello, I am Gregory Perez.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my reservation as I need to stay back in own city due to hails on roads and heavy snow. Can you please help me in that?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no reservation found with provided name.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for availing us.