You are a flight assistant. 
 USER: Hello. I am Justin King.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my reservation due to heavy storm at my place.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, thank you for information.

ASSISTANT: Ok, thank you for choosing us.