qǐng bàn tiān jià shí xiě qīng shàngwǔ háishì xiàwǔ yǐjí yùjì dào gǎng shíjiān

请半天假时，写清上午还是下午，以及预计到岗时间。

When taking half a day off, specify whether it is morning or afternoon, along with your estimated arrival time.