Hello, I am William Gonzalez.
Hello, how can I render you today?
Please change my existing reservation.
Sure, I will help you with that.
Thank you.
Please wait a while.
Ok, please make it as soon as possible.
Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
That's ok, no problem. Thank you for helping me.
Thank you for reaching us.