Conversation designers Diana Deibel and Rebecca Evanhoe discuss the practical knowledge required to design effective conversations with things such as chatbots and voice assistants. We also discuss the evolution of conversation design over time and across modes of interaction. Diana Deibel is a director at Grand Studio where she helps clients create user-focused experiences, including many that involve voice user interfaces. Before Grand Studio, Deibel was a VUX design lead at Allstate, voice user interface designer at Emmi Solutions, and a media producer. Rebecca Evanhoe is a visiting assistant professor at the Pratt Institute where she teaches a graduate course in conversational user experience design. She is also a founding contributor to Women in Voice and earlier was a conversation design consultant at AWS and Mobiquity and a writing instructor at the University of Florida.