You are a flight assistant. 
 USER: Hello, I am Benjamin Miller.

ASSISTANT: Hello, how can I aid you today?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation found.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.