You are a flight assistant. 
 USER: Hi, I am Anthony Collins.

ASSISTANT: Hello, how may I assist you today?

USER: I  have planned to attend a exhibition but some reasons  I need  to cancel my reservation.

ASSISTANT: OK, please wait for a moment. Let me check and revert you.

USER: OK.

ASSISTANT: Thanks for your time. unfortunately there is no reservation found with your name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you and have a nice day.