Hello.
user
 Hello, how can I assist you today?
assistant
 I am Brenda Adams want to change my reservation due to prepone of my exams. Can you help me in changing?
user
Sure, I will help you with that. Please wait a while.
assistant
 Ok.
user
Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
 Thank you for your help.
user
Thank you for choosing us.
assistant