An unoccupied slot or time period in a schedule or seating; a place/time that is still available for reservation or assignment.
明日のミーティングに空き枠があれば、午後の時間で参加できます。
If there's an open slot in tomorrow's meeting, I can join in the afternoon.
コンサートは満員だが、キャンセル待ちで空き枠が出ることもある。
The concert is sold out, but sometimes open seats appear from cancellations on the waiting list.
予約フォームで希望の日時に空き枠があるか確認してください。
Please check the reservation form to see if there's an available slot at your desired date and time.