Hello.
Hello, how may I render you today?
I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me?
Sure, I am here to help you. Please provide me your name  to check the list.
Larry Williams here.
Ok, please wait for a minute.
Sure.
Thanks for waiting, there is no active reservation found on your name.
No problem, Thank you.
Thank you for reaching us.