Hello,.
user
Hello,. How can I assist you today?
assistant
 I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you please help me with that?
user
May i know your name? Sure, I will help you in changing your reservation.
assistant
My name is Shirley King.
user
There is no reservation found on your name in our database for changing existing reservation. Thank you for reaching us.
assistant
Ok, no issue. Thank you.
user