  We provide a holographic description of two-dimensional dilaton gravity with
Anti-de Sitter boundary conditions. We find that the asymptotic symmetry
algebra consists of a single copy of the Virasoro algebra with non-vanishing
central charge and point out difficulties with the standard canonical
treatment. We generalize our results to higher spin theories and thus provide
the first examples of two-dimensional higher spin gravity with holographic
description. For spin-3 gravity we find that the asymptotic symmetry algebra is
a single copy of the W_3-algebra.
