Hi.
user
Hello. How may I assist you today?
assistant
I want to change my reservation, can you help me with that?
user
Sure, I am gleeful to help you with that changing reservation.
assistant
Thank you.
user
May I know your name please?
assistant
Susan Martin here.
user
Please wait for a moment.
assistant
Sure.
user
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.
assistant
Ok, no issues. Thanks for the help.
user
Thank you for reaching us, have  a great day.
assistant