XML : make voiceXML to read the result returned by the server

I am new in voiceXML and I am wondering how to read a value return by the server after post. I want voiceXML to read the server's response. I understand that the result should be in XML.

Here is my node.js/express.js code that receives the result:

  app.post("/getData", function (req, res) {      console.log(JSON.stringify(req.body));      res.header('Content-Type','text/xml').send('<?xml version="1.0" ?> <vxml version="2.0"> <block> <prompt> The time in Milwaukee is 10 </prompt> </block> </vxml>');  });    

Here is the screenshot showing that I am successfully receiving the posted content:

Here is the screenshot showing that I am successfully sending the XML result:

Here is my voiceXML file:

  <?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE vxml PUBLIC "-//BeVocal Inc//VoiceXML 2.0//EN" "http://cafe.bevocal.com/libraries/dtd/vxml2-0-bevocal.dtd">  <vxml xmlns="http://www.w3.org/2001/vxml" xmlns:bevocal="http://www.bevocal.com/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0">      <form scope="dialog">          <field name="name" modal="false">              <grammar src="grammars.grammar#Names"/>              <prompt>Whats your name?</prompt>              <filled>                  <prompt>Hello <value expr="name"/>                  </prompt>              </filled>          </field>            <field name="city" modal="false">              <grammar src="grammars.grammar#Cities"/>              <prompt>What city are you from?</prompt>              <filled>                  <prompt>You are from <value expr="city"/>                  </prompt>              </filled>          </field>            <field name="country" modal="false">              <grammar src="grammars.grammar#Countries"/>              <prompt>What country are you from?</prompt>              <filled>                  <prompt>You are from <value expr="country"/>                  </prompt>              </filled>          </field>            <field name="cityTime">              <prompt>                  What city would you like the time for?              </prompt>              <grammar type="application/x-nuance-gsl">                  [denver (san francisco) ]              </grammar>          </field>          <field name="formatTime">              <prompt>                  Twelve hour or twenty four hour clock?              </prompt>              <grammar type="application/x-nuance-gsl">                  [[twelve (twenty four)] ?hour]              </grammar>          </field>          <block>              <submit next="http://65.29.170.122/getData" method="post" namelist="name city country cityTime formatTime" />          </block>      </form>  </vxml>