Most airlines offer reserved seat selection prior to departure, but seats are never guaranteed by the airline. Bulkheads seats (those that have a wall in front and usually separate the different cabins of the plane) cannot be assigned by the CIE Tours air department. Because airlines may reassign seats for operational reasons, passengers are encouraged to reconfirm their seat assignments and any other special requests directly with their airline before departure. Passengers traveling with a group block will not have assigned seats until the day of departure.