A search for the production for a standard model Higgs boson in association with a top quark pair ($\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$) is presented. The analysis is based on pp collision data collected by the CMS experiment at a center of mass energy of \sqrt{s}=13~\mathrm{TeV} in 2016, and corresponding to an integrated luminosity of 35.9~\mathrm{fb}^{-1}. We target final states where the Higgs boson decays to $\mathrm{WW}^{*}$, $\mathrm{ZZ}^{*}$ or $\tau\tau$, and at least one of the top quarks decays leptonically, by selecting events with two leptons of the same charge, three leptons or at least four leptons, and b-jets. We obtain a best fit $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ yield of 1.5~\pm~0.5 times the standard model prediction, with an observed (expected) significance of $3.3\sigma$ ($2.5\sigma$), by the combination of these results with those obtained from the 2015 dataset.

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