A locking system including a latch assembly that actuates a cancel cable and thereby a cancel lever of a lock device includes a latch lever that has a first engaging surface and receives a striker positioned at the end of a rail of a vehicle, a cancel latch lever including an engagement tab that is engaged by the first engaging surface of the latch lever in an overstroke position of the latch lever, and a cancel cable that interrupts a transmission of power from an actuator to a lock device in accordance with a rotation of the latch cancel lever occurring from an engagement of the engagement tab with the engagement surface.