A unified greeting system scans social media for content. The content can be any type of post to a social media site. If content is directed to a user of the unified greeting system and if the user is currently unavailable, the unified greeting system determines if the content requires a reply. If a reply is warranted, the unified greeting system determines the characteristics of the content to determine the type of reply. Then, the unified greeting system provides the reply, which can be an “out-of-office message.” The out-of-office message is the posted to the social media site to alert the poster that the person is currently unavailable.