A booked visit is shorter than the clinician-approved booking instruction. What would you do?

Fictional booking exhibit: an appointment tomorrow is booked 10:00–10:30 in Room 2. The dentist's current, patient-specific booking instruction says “reserve 45 minutes”; it was entered yesterday at 16:00. The 30-minute booking was created three days ago. Room 2 has another patient booked at 10:30. Reception may change a booking only after the dentist confirms the revised arrangement and the patient agrees. You can flag conflicts and collect available options, but cannot shorten care, move patients between clinicians, or extend the booking independently.