<action application="say" data="en number pronounced ${expr ${conf_count} - 1}"/>
<include>
  <!-- Sample dialplan for announcing the call count -->
  <extension name="Announce Conf Count (Inline)">
    <condition field="destination_number" expression="^ANNOUNCE_CONF_COUNT_PRIVATE$">
      <action application="set" data="conf_count=${conference ${conference_name} list count}"/>
      <action application="log" data="INFO ${conf_count}"/>
      <action application="say" data="en number pronounced ${conf_count}"/>
    </condition>
  </extension>
</include>