You are a flight assistant. 
 USER: Hello, Brenda Moore here.

ASSISTANT: Hello. How may I help you?

USER: I have planned to attend a dog show in Charlotte, but it got cancelled due to some reason.

ASSISTANT: Ok.

USER: Could you help me to change my reservation?

ASSISTANT: Sure, please hold on. Sorry. There is no reservation on your name.

USER: No problem. Thank you for assisting me.

ASSISTANT: Thank you for choosing us, have a nice day.