AND.. Not worry about any potential holiday plans getting ruined because through no fault of your own the company car that you pay for is not available because due to massive overbookings, it has been rented to a customer who a) didn't want that size of car so will complain and get it for free, and b) waited angrily in the office for most of the day so that not only are your travel plans messed up, but theirs as well.