Hello.
user
Hello, how may I provide assistance to you?
assistant
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?
user
 Sure, I can change your reservation right now. Before that I need to know your good name please?
assistant
I am Mark Smith.
user
Thank you. Please stay online for a while, I will check your reservation status and let you know.
assistant
Sure.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
No problem, thank you for the information.
user
Thank you for availing us.
assistant