You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have already made my reservation with AA airlines, but my plan to visit Boston has been cancelled. Can you please help me in cancelling my previous reservation?

ASSISTANT: Sure, can I know on the name on which the booking is done.

USER: The ticket was booked on my name Jacob Robinson.

ASSISTANT: I am sorry to inform you that there are no reservations on your name.

USER: No problem as I already wanted to cancel my reservation.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your valuable time.