1. A machine-readable storage medium containing machine-executable instructions for implementing a mixed-initiative message augmenting agent system for augmenting like messages with information pertinent to the like messages, said machine-executable instructions comprising: a first set of machine-executable instructions that implement a build-and-demonstrate module that allows a user to create a form by retrieving information pertinent to a first one of the like messages; a second set of machine-executable instructions that implement an augmentation-repair module that allows the user to repair mixed-initiative message augmenting agent system; and a third set of machine-executable instructions that implement a learning algorithm that teaches a machine-learning agent to augment subsequent ones of the like messages as a function of at least one of 1) the retrieving of the information pertinent to the first one of the like messages and 2) the repair of the mixed-initiative message augmenting agent system.