Replace the old ASAP/next-week/Mon-Tue-Wed/morning-afternoon subtree with
the new direct datetime flow:
- MSG 1: AI self-introduction (sent first via REST API)
- MSG 2: "When would you like to reschedule?" (intent response)
- Patient gives date → day-open check (office hours) with fail loop
- AI asks time → hours check (within AM/PM session) with fail loop
- AI confirms: "Just to confirm — [date at time]?"
- Patient YES/NO → slot availability check with fail loop
- DB: appointment moved, AI badge shown on schedule grid
- Patient thanks → closing message
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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