1. A dialog manager for a spoken dialog system comprising a computer, a processor, and memory, and comprising: a decision module for selecting a path from a plurality of alternative paths for a given call, wherein each path implements one of a plurality of strategies for a call flow; and a weighting module for weighting the path selection decision, wherein the weighing module is operatively connected to a probability estimator for estimating a probability value that a given path of the plurality of paths is the best-performing path; and wherein the system is configured to direct incoming calls to each of the alternative paths selected by the decision module.