You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may render you today?

USER: Myself Sarah Taylor. I want to cancel my recent reservation due to some changes in my exam and the exam is not rescheduled so can you help me in cancelling?

ASSISTANT: Sure, I will solve your concern in cancelling the flight ticket. Please allow me a moment to check whether any active reservation is found on your name or not.

USER: Thank you for your quick response and I will wait.

ASSISTANT: Sorry Taylor, there is no active reservation on your name in our database.

USER: That's ok, no problem, may be it has been cancelled by my friend and I am not aware of it. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.