Advice for Conversational UIs: Top 10 Best Practices for Voice User Interface Design. These points are really good, and not all voice specific -- steer the user away from phrases that are less likely to parse; have a fallback from natural language to directed prompts [thanks Phil].
Advice for Conversational UIs: Top 10 Best Practices for Voice User Interface Design. These points are really good, and not all voice specific -- steer the user away from phrases that are less likely to parse; have a fallback from natural language to directed prompts [thanks Phil].