Hello.
Hello, how can I help you today?
I made a reservation earlier in the wrong date unknowingly. Can you please change my existing reservation?
Sure, I am here to help you. May I know your name to check further in our database?
I am Christopher Smith.
Please stand by.
Ok.
 Sorry, no reservation found on your given name in our database to change it.
Ok, Thank you.
Thank you for contacting us and have a nice day.