Practical software guides
An itinerary can become incorrect between quotation and travel. Keep supplier facts versioned, and distinguish a change to a future offer from a change affecting an existing booking.
| Event | System response |
|---|---|
| Boat supplier changes departure 09:00 to 10:00 | Create offer version 3 with the supplier source and effective date |
| Website offer uses version 2 | Hold new sales until the displayed time is checked |
| Confirmed booking uses version 2 | Staff review transfer and guest consequences |
| Guest notice required | Approved message; record delivery and unresolved contact |
| Supplier later reverses change | Create a new version; retain both decisions |
Connect the PMS, booking engine and supplier channel only through supported interfaces. A staff note is not evidence that the website changed. Verify each affected surface and show failures instead of silently declaring everything synchronized.
Use deterministic checks for time, currency, availability and quoted total. If AI drafts the explanation, a person checks the supplier source and booking before sending. See the quote verification example. Prices, cancellation terms and entitlements require the actual supplier/customer agreement; the example supplies no universal travel rule.