Hi.
Hello. How may I assist you today?
I want to change my reservation, can you help me with that?
Sure, I am gleeful to help you with that changing reservation.
Thank you.
May I know your name please?
Susan Martin here.
Please wait for a moment.
Sure.
Thank you for waiting, but I am sorry to say that, there is no active reservation found on your name in our reservation list to change it.
Ok, no issues. Thanks for the help.
Thank you for reaching us, have  a great day.