I am writing on behalf of our CEO to confirm next week's board meeting.

我代表我們執行長寫信，確認下週的董事會會議。

Ms. Chen signed the shipping contract on behalf of the entire logistics department.

陳小姐代表整個物流部門簽署了這份運輸合約。

On behalf of the hotel staff, we apologize for the delay in your room service.

我們謹代表飯店全體員工，為客房服務的延誤向您致歉。