You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Roberts Robinson, I want to cancel my reservation as my plan to meet my sister is cancelled. Can you help me to cancel my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

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

USER: Thank you for the information.

ASSISTANT: Thank you for opting us.