Speech interaction strategies for a humanoid assistant Sebastian Stüker, Stefan Constantin, Jan Niehues, Thai-Son Nguyen, Markus Müller, Ngoc Quan Pham, Robin Rüde and Alex Waibel MATEC Web Conf., 161 (2018) 01002 Published online: 18 April 2018 DOI: 10.1051/matecconf/201816101002