WITH ConsecutiveSeats AS (
    SELECT 
        LINE_ID,
        SEAT_NO,
        LEAD(SEAT_NO, 1) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS SEAT_NO_2,
        LEAD(SEAT_NO, 2) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS SEAT_NO_3,
        RSV_STATUS,
        LEAD(RSV_STATUS, 1) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS RSV_STATUS_2,
        LEAD(RSV_STATUS, 2) OVER (PARTITION BY LINE_ID ORDER BY SEAT_NO) AS RSV_STATUS_3
    FROM 
        SEAT_RESERVE
)
SELECT 
    LINE_ID AS LINE,
    SEAT_NO AS SEAT_F,
    SEAT_NO_3 AS SEAT_T
FROM 
    ConsecutiveSeats
WHERE 
    RSV_STATUS = '0' AND 
    RSV_STATUS_2 = '0' AND 
    RSV_STATUS_3 = '0'
ORDER BY 
    LINE_ID DESC, 
    SEAT_NO ASC;