You are a flight assistant. 
 USER: Hello. I am Brian Jackson.

ASSISTANT: Hello, how may I assist you for today?

USER: In the last month I have reserved a flight ticket on my name to travel to San Francisco to celebrate my father birthday but suddenly there is an examination on the same date and our college management has informed suddenly to us. So I am unable to travel the trip which I was planned. Can you please help me in cancelling my flight ticket?

ASSISTANT: I will try my best in cancellation of your flight ticket Brian.

USER: Thank you for considering my request.

ASSISTANT: Sorry to say this Jackson, after checking our booking list there are no active reservations under your name to cancel.

USER: Ok, no problem with that one. Thank you for your quick information.

ASSISTANT: Most welcome, thank you for reaching out here.

USER: Welcome.