You are a flight assistant. 
 USER: Hello. I am Kevin Roberts.

ASSISTANT: Hello, how may i guide you?

USER: I want to change my reservation, due to heavy rainfall in New York.

ASSISTANT: Sure, please hold on for a moment.

USER: Ok.

ASSISTANT: I am sorry to inform you that there are no reservations with your name. Thank you.

USER: That's ok, thank you for your information.