Once your Virtual Human is created, you will be prompted to create the first conversation.  

Enter a name for the conversation and then either choose to start from a blank slate, or select a template.

A template is useful if you are producing something with a standard format. 

There are two places you can add more Conversations to your Virtual Human. Firstly, from the Conversations menu, select + Add New Conversation. Secondly, if you are viewing all Conversations, click the button + New Conversation