# Notification System Architecture

Calian Hotel leverages a multi-channel notification dispatcher supporting In-App alerts, transactional Email, SMS, and WhatsApp messages.

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## 1. Notification Events & Dispatch Channels

| Event Trigger | Recipients | Channels | Content / Action |
| :--- | :--- | :--- | :--- |
| **New Direct Booking** | Guest, Front Desk, Reservations | Email, In-App, WhatsApp | Booking confirmation voucher & calendar invite |
| **Payment Received** | Guest, Accounts, Front Desk | Email, In-App | Payment receipt and updated folio balance |
| **VIP Guest Arriving Today** | GM, Front Desk Manager | In-App, SMS | VIP pre-arrival prep alert & room inspection |
| **Maintenance Ticket Created** | Maintenance Engineer, Housekeeping | In-App, SMS | Urgent repair notification with OOO status |
| **Room Inspected & Ready** | Front Desk | In-App | Room available for immediate check-in assignment |
| **New Event RFP Submitted** | Sales & Events Team | In-App, Email | Lead alert with event specifications & contact |
| **Post-Stay Review Request** | Checked-out Guest (24h post) | Email, WhatsApp | Private survey link and Google Review CTA |