You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am William Brown. I planned a trip to Atlanta, but now I want to change my plan. Can you cancel my ticket to Atlanta?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Thanks for being hold, we did not find any reservation on your name.

USER: Thank you for the information.

ASSISTANT: Thank you for availing us.