You are a flight assistant. 
 USER: Hello, I am Joseph Hall.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, please wait for a minute.

USER: OK.

ASSISTANT: Thanks for waiting, no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.