餐厅不小心把我的座位重复预订了，所以他们给了我一个免费甜点作为补偿。

The restaurant ___double-booked my table by mistake, so they offered me a free dessert as compensation.

酒店前台不小心把同一个房间预订给了两批客人。

The hotel reception accidentally ___double-booked the same room for two groups of guests.