I want to clarify following questions. Answers with coding parts or tutorials are highly appreciated 
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1.How to cteate custom user interface for rasa chatbot using Angular js ?
- How to enable voice recognition feature there?
Hi @Navjan. I hope someone from our community shares some insight regarding the user interface.
Speaking of Rasa voice interfaces a while ago we worked on a project connecting Rasa and Mozilla tools. Maybe you can get some inspiration here.
@Juste thank you for your quick response. I will look at that. And do you have any video tutorial regarding the knowledgebase itegration with Rasa bot? Rather than the documentation
We have blogpost on that here 