Translation of "complete change" into Japanese

When the brothers went to pay the fee after the convention, the manager’s attitude had completely changed.

兄弟たちが大会後に使用料を支払いに行くと,管理人の態度は一変していました。

The situation completely changed and the besieging army fell into a crisis .

攻囲 軍 が 一転 、 窮地 に 陥 っ た 。