2 sentences

1. 他整天忙着帮老板跑腿。

   tā zhěng​tiān máng zhe bāng lǎo​bǎn pǎo​tuǐ.

   He spends all day running errands for his boss.

   Source: Dong Chinese Dictionary

2. 她在一家事务所当小妹，负责跑腿和打杂。

   tā zài yī jiā shì​wù​suǒ dāng xiǎo​mèi, fù​zé pǎo​tuǐ hé dǎ​zá.

   She works as an office girl at a firm, handling errands and odd jobs.

   Source: Dong Chinese Dictionary