... historical information, and Ω = {A1 , , Aq } is the set of DAs Using the maximum approximation for summation, (1) can be written as A = arg max t A Ω h (A, Ht ) = P r(At = A | At−1 ) W W = arg max ... Figure 2: An example of a dialogue management module using n-gram model for dialogue act sequence in the domain of historic spot Models for Dialogue Act Detection Referring to the SDS depicted in Figure ... Ohtake, T Misu, H Kashioka, and S Nakamura 2009b Statistical dialog management applied to wfst-based dialog systems In Proc IEEE International Conference on Acoustics Speech and Signal Processing...