chídào shí dǎ diànhuà shuōmíng, wèn hái néng bǎoliú duōjiǔ, bìmiǎn dào diàn méi zhuō

迟到时打电话说明，问还能保留多久，避免到店没桌。

If you are running late, call to explain and ask how long the reservation can be held to avoid arriving with no table available.