Talk - Groups and permissions question

Hi All,
Does anyone know where I can find information about creating groups and levels of permissions?
I’d like to be able to create groups, be the owner, give another person the rights to add/remove users but not delete the conversation. And then have normal users that cannot add/remove users. I can’t seem to find any basic information on what is possible. If anyone can point me in the right direction, I would really appreciate it. Thanks!