You are a flight assistant. 
 USER: Hello,. I am Brenda Young.

ASSISTANT: Hello, how may I support you?

USER: I just want to cancel my reservation, due to my convocation has been postponed.

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: There is no reservation found in your name.

USER: Thank you for your service.

ASSISTANT: Thanks for contacting us. Have a nice day.