Hello.
Hello, how may I aid you at present?
Due to some technical issues, my meeting place has been changed. Please help me for changing my existing reservation.
Sure, we are glad to help you to change it. To proceed further, may I know your name?
Ok, I am Justin Parker.
Ok, please wait for a couple of minutes.
Ok.
 Sorry to say this, there is no active reservation with your name to fulfil your request.
Ok, no issues. Thank you.
Thank you for availing us.