You are a flight assistant. 
 USER: Hello. I am Donna Anderson.

ASSISTANT: Hello, how may I serve you for the day?

USER: Please, cancel my existing reservation as my plan to attend a seminar got cancelled.

ASSISTANT: Sure. Give me a moment, I will check your previous reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for contacting us.