Hello.
Hello, how can I assist you today?
 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 help me out?
Sure, may I know your good name?
My name is Charles Miller.
Please wait for a moment.
Sure.
Sorry to say that, no reservation was found with your good name.
Ok, No issues. Thank you.
Thank you for reaching us.