Hello.
Hello, how can I help you today?
Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?
Let me know your name to check your reservation?
I am Jacob Hernandez.
 I have checked in reservation list to change your ticket, but could not find any reservation with your name.
Sure. No problem, thank you for the information.
Thank you for reaching us.