Hello.
user
Hello. How can I aid you today?
assistant
I want to change my existing reservation due to postpone of my event.
user
Sure, can you share me your good name to proceed further?
assistant
I am Nancy Johnson.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Ok. No issue, Thank you.
user
Thank you for reaching us.
assistant