CMS for appointments

Deadline in 2 days! Requirements Information What I need is a system which sends SMS messages to clients with a reminder for an appointment. The appointments and relevant reminders have to be filled in a back end by the clients. Project has 2 parts. CMS system: - Clients need to make appointment in a secure environment behind a login field. Each client has a login name and password. - Clients need to login and logout - Clients can make their own accounts but they need to be approved by the admin. - Admin needs to make/edit/delete users - If users are logged in; they need make/edit/delete appointments. - For each appointment, there needs to be a telephone number, a starting time/date and an ending time/date. -There can be set multiple reminders per appointment. (See attachment) -Those reminders can be set X days/hours/minutes before/after a starting and ending time. (See example). They also have to set a message of the reminder. (See attachment) - Template/design is already made; see attachment. - Old appointments with their reminders (e.g. 1 month old) have to move to an archive. So the CMS needs 3 menu tabs for user: Appointments, reminders and archive. Twilio integration: - SMS alerts are send with the application of Twilio ([login to view URL]). - Every 15 minutes a cronjobs checks if it has to send alerts to clients Note: Old appointments have to move to an archive so that they are not increasing the load time of the cronjob script. If you have questions please ask.