Hi.
user
Hello. How can I help you today?
assistant
Can you please help me in changing my existing reservation?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
Kenneth Moore here.
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.
user
Thank you for reaching us.
assistant