You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I would like to change my existing reservation due to bad weather at my place. Can you help me update my reservation which was made on the name of Daniel White?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on the name of Daniel White.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.