Hello.
Hello, how can I assist you at present?
 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?
Sure, I am here to aid you.
Thank you.
Ok, May I know your name to proceed further?
Sure, my name is Christine Thompson.
Ok, please wait for a moment.
Sure.
Thank you for your patience, There was no reservation found on your given name.
Ok, thanks for your response.
Thank you for choosing us.