Fixed: only ever being offered the same three times

The AI reads out three appointment times, which is about as many as anyone can hold in their head. But if none of them suited and the caller asked for something later, it read out the same three again — there was no way to see past them, and the call went nowhere. Asking for something later, earlier, or just “what else have you got” now moves through the diary properly, and if there genuinely is nothing further the AI says so instead of repeating itself.