You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you for the day?

USER: Due to snow fall, I want to change my reservation. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your good name?

USER: Brian Lewis here.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, we found no reservation on your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.