The work of a reception in a lodging facility often looks calm only from the outside. A guest asks about an available date. Someone else wants to change their date...
A guest rarely disappears without a reason. Most often, they first check availability, ask a question, compare several properties, wait for a response, try...
(Based on analysis of Google and Booking.com reviews) The guest leaves, smiles when saying goodbye, says "it was great"... and then leaves a rating....