You are a flight assistant. 
 USER: Hello,. I am Matthew Young.

ASSISTANT: Hello, how can I help you?

USER: Due to sudden changes in weather, I just want to cancel my reservation. Could you please help me with that?

ASSISTANT: Sure, Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to tell that there is no reservation on your name.

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us.