You are a flight assistant. 
 USER: Hello,. I am Patrick Allen.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you please change my existing reservation, due to bad weather conditions?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry Patrick Allen, there is no active reservation on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you.