Technologies described herein offer a contextually aware schedule service technology. User-related activity is monitored to detect a future event related to the user. Information is extracted from the monitored user-related activity information. The extracted information about the future event can be evaluated to determine whether it is related to another future event associated with the user. When a particular future event for the user changes, a set of related events may be utilized to determine a related event is affected by the change. For example, a user may be notified to cancel or modify the future event. Additionally, service providers associated with the affected event(s) may be notified, or a personal assistant service may facilitate automatically rescheduling the affected events.