You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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: Sure, may I know your name to check the current status and revert you.

USER: Yes, I am Steven Clark.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by your name in our data base.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.