3 sentences

1. 礼毕，请各位嘉宾入座休息。

   lǐ bì, qǐng gè​wèi jiā​bīn rù​zuò xiū​xi.

   The ceremony has concluded; guests, please take your seats and rest.

   Source: Dong Chinese Dictionary

2. 这里没有固定的座位，大家请随意入座。

   zhè​lǐ méi​yǒu gù​dìng de zuò​wèi, dà​jiā qǐng suí​yì rù​zuò.

   There are no fixed seats here; please sit wherever you like.

   Source: Dong Chinese Dictionary

3. 请大家按位入座，我们的会议就要开始了。

   qǐng dà​jiā àn wèi rù​zuò, wǒ​men de huì​yì jiù yào kāi​shǐ le.

   Please take your seats; our meeting is about to begin.

   Source: Dong Chinese Dictionary