You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Paul Hill here. I want to change my reservation due to heavy snowfall in my location, can you help me?

ASSISTANT: Yes, I am here to help you about that.

USER: Thanks.

ASSISTANT: Sorry Hill, there is no existing reservation under your name to change.

USER: No problem, thank you for checking.

ASSISTANT: Most welcome, thank you for reaching out here.