public void ReserveOffer()
{
service.ClearReservationTables();
service.Save();
bool actual = service.IsOfferReserved(1, 1, 1);
Assert.IsFalse(actual);
// Reserve attraction
service.ReserveOffer(1, 1, 1);
actual = service.IsOfferReserved(1, 1, 1);
Assert.IsTrue(actual);
}