Hi.
user
Hello, How can I best serve you today?
assistant
Could you help me to amend my existing reservation?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
I am Patricia Thompson.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Not a problem, thank you for the information.
user
Thank you for choosing us.
assistant