Hello.
user
Hello, how can I help you today?
assistant
As my meeting got postponed with my client, can you please help me in changing my existing reservation?
user
 Let me know your name to check your reservation?
assistant
I am Angela Moore.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
Ok, no issues. Thank you for checking.
user
Thank you for choosing us.
assistant