Forget your conversations with Siri, where your words are bound within a *bing* and a *ba-ding*. Siri (and Google Now, Cortana, and other voice-based assistants) brought big advances to speech recognition, natural language processing, and speech synthesis. But to make human-robot dialogues better, we’ll have to improve not only what robots say but how they say it. What we need is for these interactions to be more like the dynamic conversations in “Her.”