Disclosed herein is a method and system for alerting users of an appointment system of any change in an appointment schedule between practitioners and clients. If a user registered in the appointment system chooses to schedule an appointment, the user confirms the appointment by sending a conformation message to the message handling module. The appointment system, at predetermined intervals of time compares the status of preferred schedule of appointment against the existing schedule of appointments and if there is any change in the status of scheduled appointment, the change is stored in the central database and an alert message generated. The alert messages are sent via email or short message services (SMS) or a prerecorded voice message on their wire-line phone to users affected by the change in schedule and who have registered for the appointment service.