2 sentences

1. 请大家自便，别客气。

   qǐng dà​jiā zì​biàn, bié kè​qi.

   Please help yourselves; don't be formal.

   Source: Dong Chinese Dictionary

2. 这件事情就听他自便吧，我们没有权利过多地干涉。

   zhè jiàn shì​qing jiù tīng tā zì​biàn ba, wǒ​men méi​yǒu quán​lì guò duō de gān​shè.

   Just let him do as he pleases in this matter; we have no right to interfere too much.

   Source: Dong Chinese Dictionary