Hello.
Hello. How can I aid you today?
I want to change my reservation, which was done three days ago. Can you help me?
Sure,  I am gleeful to help you with that. May I know your name please?
My name is Angela Smith.
Please wait for a while.
Sure.
Thank you for waiting, but I am very sorry to say that, there is no active reservation found on your name in our reservation list to change it.
Ok, thank you for the information.
Thank you for reaching us, have a nice day.