Hello. I am Mary Collins.
 Hello, I would like to know how can I assist you at this pleasant evening?
Is this flight booking agency?
Yes, you are at the right place.
Ok, my cousin's wedding is postponed to next month so, I want to change my existing reservation. Can you help me with this?
Sure, I can help you with that. Just hold on for a while.
Sure.
Sorry to inform you, there is no reservation found with your name Mary. Thank you for reaching us.
Thank you for your information.
It's my pleasure.