You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Linda Young here. I would like to change my reservation due to heavy snowfall in my region, can you help me?

ASSISTANT: Sure Linda, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

USER: It's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for approaching us.