Hello,.
user
Hello, how may I address you now?
assistant
I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please help me with that?
user
Sure, I would be happy to help you. May I know your good name please?
assistant
Edward Martin is my name.
user
Ok, please wait for a while, I will check the details and revert you.
assistant
Sure.
user
Sorry to inform you that there is no reservation found on you name.
assistant
Ok, not an issue. Thank you for your  information.
user
Thanks for reaching us and have a good day.
assistant