A system, system, and program for automatically inferring and updating an availability status of a user are provided. At least one current activity of a user is detected, where the current activity includes at least one system level event within a computer environment accessible to the user. A current availability status for a particular communication request is inferred from the current activity of the user in view of multiple availability rules, where the multiple availability rules map current activity to multiple possible availability statuses. In addition, inference of the current availability status is determined based on the identity of the requester of communication with the user, where the multiple availability rules map the requester identity in combination with the current activity to multiple availability rules. Output of the current availability status is controlled, such that the requester of the particular communication request is notified of an availability of the user to respond to the particular communication request.