1. A method comprising: conducting a dialog exchange between an automated dialog system and a user, the dialog exchange including at least two dialog system prompts and two user input opportunities; and determining whether a probability threshold is exceeded that relates to a prediction that continuing the dialog exchange with the user will converge and succeed to a stage consistent with the user's intent or diverge and fail, wherein determining whether the probability threshold is exceeded is based, at least in part, training data on multiple dialog turns in a corpus of dialogs tagged for success or failure after at least two dialog prompts and two user inputs.
11. The method of claim 1 , wherein the probability is determined using recognition and understanding data derived from the user's input communication.