You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Brain Johnson. I want to cancel my recent reservation due to an emergency meeting. Can you please help me with this?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there was no reservation found with your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.