HI.
Hello.
I am Barbara Martinez.
How may I assist you?
 I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out?
Sure, I will help you with that. Wait for a moment please. I have searched online but I could not find your flight reservation to cancel it.
That's ok, than you for your information and effort.
Thank you.