Hi.
Hello.
I am Carol Thompson.
How can I help you today?
 Due to an emergency, I am unable to catch the flight on the dates which I have reserved, so can you please help me in changing my flight ticket booking?
Sure, I will help you with this. Please wait for a moment.
Ok, take your time.
Sorry Carol, no reservation found by your name in our records.
It's ok, thanks for your information.
My pleasure.