“…And multimodal conversation becomes daily activities for mobile phone users. These advances have extended the initial application domains of conversational interfaces to complex information retrieval and question answering applications (Metze et al, 2014), ecommerce systems (Tsai, 2005), surveys applications (Stent et al, 2006), in-car systems (Hofmann et al, 2014), remote control of devices and robots in smart environments (Minker et al, 2010), elearning and tutoring systems (Kopp et al, 2012), communication within vehicles (Misu et al, 2015), Ambient Assisted Living systems (Bickmore et al, 2010), recommendation systems (Reschke et al, 2013), or virtual companions (Horchak et al, 2014). Griol et.el.…”