odoo/addons/im/static/src/xml/im_common.xml

<?xml version="1.0" encoding="UTF-8"?>

<templates>
<t t-name="im_common.conversation">
    <div class="oe_im_chatview_header">
        <span class="oe_im_chatview_users"/>
        <scan class="oe_im_chatview_nbr_messages" />
        <button class="oe_im_chatview_close">×</button>
    </div>
    <div class="oe_im_chatview_disconnected">
        All users are offline. They will receive your messages on their next connection.
    </div>
    <div class="oe_im_chatview_content">
        <div class="oe_im_chatview_conversation"></div>
    </div>
    <div class="oe_im_chatview_footer">
        <input class="oe_im_chatview_input" t-att-placeholder="widget.inputPlaceholder" />
    </div>
</t>

<t t-name="im_common.conversation.header">
    <span t-foreach="widget.get('users')" t-as="user">
        <img t-if="user.get('im_status')" t-att-src="to_url('/im/static/src/img/green.png')" class="oe_im_chatview_online"/>
        <t t-esc="user.get('name')"/>
    </span>
</t>

<t t-name="im_common.conversation_bubble">
    <div class="oe_im_chatview_bubble">
        <div class="oe_im_chatview_clip">
            <img class="oe_im_chatview_avatar" t-att-src="user.get('image_url')"/>
        </div>
        <div class="oe_im_chatview_from"><t t-esc="user.get('name')"/></div>
        <div class="oe_im_chatview_bubble_list">
            <t t-foreach="items" t-as="item">
                <div class="oe_im_chatview_bubble_item"><t t-raw="item"/></div>
            </t>
        </div>
        <div class="oe_im_chatview_time"><t t-esc="time"/></div>
    </div>
</t>
</templates>