如要啟用時段層級的取消時段，請在 CheckAvailability 回應中傳回 last_online_cancellable_sec 欄位。例如：
JSON
/v3/CheckAvailability Response JSON: { slot {[...]}, count_available: 1, last_online_cancellable_sec: 1552930200 }
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上次更新時間：2024-11-26 (世界標準時間)。
[null,null,["上次更新時間：2024-11-26 (世界標準時間)。"],[[["Slot-level cancellation windows are enabled by including the `last_online_cancellable_sec` field in `CheckAvailability` responses."],["This field indicates the last timestamp (in seconds) when a slot can be canceled online, allowing for more granular control over booking cancellations."]]],["The `last_online_cancellable_sec` field, included in the `CheckAvailability` response, enables slot-level cancellation windows. This field specifies a timestamp, representing the last second a slot can be cancelled online. When returned, it allows users to cancel specific slots within the designated timeframe. The example shows a JSON response demonstrating how this field is implemented, including the slot data, available count and the cancellable time.\n"]]