一般参会者都应知道自己在会议上担任的职责的。但如果需要想再三明确一遍谁来负责做会议纪要，谁提供某项报告之类的。那么不妨这样直接讲：

Tyra has agreed to take the minutes. Tyra同意做会议纪要。
Ian, would you mind taking notes today? Ian,你今天做(会议)笔记好吗?
Lauren has kindly agreed to give us a monthly report on this matter. Lauren已经同意就此事给我们个月报。

Tyra will lead Item 1, Samuel Item 2, and Hanah Item 3.
Tyra领导（讲述）第1项，Samuel领导第2项，Hanah领导第3项