Please leave the signed contract with the concierge in the lobby if no one answers.

如果沒人應門，請把簽好的合約交給大廳的管理員。

The courier was instructed to deliver all office supplies to the building concierge before noon.

快遞員被告知要在中午前把所有辦公用品交給大樓管理員。

The property management firm is hiring a concierge to handle mail and visitor registration.

這家物業管理公司正在招募一名大樓管理員，負責處理郵件和訪客登記。