_conversation.html.erb

<% @recipient = private_conv_recipient(conversation) %>
<% @is_messenger = false %>
<li class="conversation-window" 
    id="pc<%= conversation.id %>" 
    data-pconversation-user-name="<%= @recipient.name %>" 
    data-turbolinks-permanent>
  <div class="panel panel-default" data-pconversation-id="<%= conversation.id %>">
    <%= render 'private/conversations/conversation/heading', 
                conversation: conversation %>

    <!-- Conversation window's content -->
    <div class="panel-body">
      <%= render 'private/conversations/conversation/messages_list', 
                  conversation: conversation %>
      <%= render 'private/conversations/conversation/new_message_form', 
                  conversation: conversation,
                  user: user %>
    </div><!-- panel-body -->
  </div>
</li><!-- conversation-window -->