Text: If you arrive in the Lake District without a reservation, contact one of the information offices of the British Tourist Authority for lists of lodgings and assistance in booking (see Accommodations, page 108, and Tourist Information Offices, page 125).
Entailment: The British Tourist Authority can provide lists of lodgings and booking assistance for the Lake District if you do not have a reservation.
Contradiction: If you arrive in the Lake District without a reservation, you're better off leaving because the British Tourist Authority has no information that could be of use to help you in the area.