You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to heavy snowfall there, can you please look for it?

ASSISTANT: May I know your name please?

USER: My name is Anthony Phillips.

ASSISTANT: Sorry, I didn't found any reservation basis on your details.

USER: That's fine, it may be cancelled by my friends, thank you for giving information.

ASSISTANT: You are welcome.