Clinics lose patients to missed appointments and unanswered phones. I build a two-way SMS/WhatsApp reminder and waitlist agent: patients confirm, cancel, or reschedule by replying in plain language, cancelled slots refill from your waitlist, and missed calls get a text-back within 30 seconds. Red-flag symptoms always go to a human through fixed rules. Includes: Twilio/WhatsApp reminders, AI reply handling with Claude, waitlist refill, missed-call text-back, calendar/PMS write-back where an API exists, testing on synthetic data, handover docs, and 2 weeks of support.