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. “谢谢你的帮忙！”“不会，别客气。”

   “ xiè​xie nǐ de bāng​máng!”“ bù​huì, bié kè​qi.”

   “Thanks for your help!” “No problem, don't mention it.”

   Source: Dong Chinese Dictionary