Hi.
user
Hello, how may I render you today?
assistant
Due to sudden change in my trip to another location, I would like to do some changes in existing my reservation. Can you please help me out?
user
Sure, may I know your good name?
assistant
I am Jonathan Phillips.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
 Not a problem, thank you for the information.
user
Thank you for choosing us.
assistant