Rails link_to syntax in order to add some inner html

I have this code to generate a "unfollow" button via the 'link_to' function:

<%= link_to "Non seguire più", user_user_relationship_path(id:@relationship.id), remote: true, id: "follow_#{@user.id}", class:"btn btn-small btn-danger", method: :delete %>

I would like to know ho to use the "do..end" syntax with all those arguments.. Thanks!