Hello.
user
Hello, How exactly I can serve you the best 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 Jacob Brown.
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