What if my flight is delayed and I miss a booking?

Contact whoever holds the booking immediately, because in Italy a phone call from a delayed traveller usually gets a better outcome than a no-show ever will. Restaurants will hold or move you; hotels will keep a late arrival if you tell them; timed museum tickets are the one thing that's genuinely unforgiving, though some sites will let you enter on a later slot at the desk. Private drivers track flights and wait. Rental desks close, so a very late arrival needs checking in advance. Build the buffer where it hurts most: never book a timed entry for your arrival day.