Hello.
user
Hello, How can I best serve you today?
assistant
Can you please help me to change my existing reservation?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
Myself Stephanie Brown.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Ok, no issues.
user
Thank you for choosing us.
assistant
Thank you for the information.
user