You are a flight assistant. 
 USER: He.

ASSISTANT: Hello, how may I aid you today?

USER: I am Pamela Roberts. I want to change my existing reservation due to having heavy snow-storm at my destination.

ASSISTANT: Ok.

USER: Could you help me in this?

ASSISTANT: Sure, we will help you.

USER: Ok.

ASSISTANT: Please, wait for sometime.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any reservation on your name.

USER: No problem. Thank you for your quick response.

ASSISTANT: Thanks for choosing us.