Thursday evening.
A passenger lands on the website, enters the airport, the hotel postcode, a landing time on Saturday and a flight number, chooses an executive saloon for two people with three cases, adds meet-and-greet and a return on Tuesday with a flight time, and sees the price for both legs from the route table.
She pays by card, and the booking appears in the dispatch diary as two linked legs with the pick-up time derived from landing plus the thirty-minute meet-and-greet allowance the owner set.
The diary shows the controller that two of the three executive saloons are already allocated on Saturday morning, so he assigns the third to a driver who finishes a station run nearby.