Hello,.
Hello, How can I help you today?
I am Richard White.
Ok.
I want to change my existing reservation, so can you help me with changing my reservation?
Sure, I will help you with that.
Thank you.
Please wait a while.
Sure.
 Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
No problem, thank you for the information.
Thank you for choosing us.