Hello World in VoiceXML

<?xml version="1.0" encoding="UTF-8"?>
<vxml xmlns="http://www.w3.org/2001/vxml"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.w3.org/2001/vxml
   http://www.w3.org/TR/voicexml20/vxml.xsd"
   version="2.0">
  <form>
    <block>Hello World!</block>
  </form>
</vxml>

<vxml xmlns="http://www.w3.org/2001/vxml"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.w3.org/2001/vxml
   http://www.w3.org/TR/voicexml20/vxml.xsd"
   version="2.0">
  <form>
  <field name="drink">
     <prompt>Would you like coffee, tea, milk, or nothing?</prompt>
     <grammar src="drink.grxml" type="application/srgs+xml"/>
  </field>
  <filled>
     <submit next="http://www.drink.example.com/drink2.asp"/>
  </filled>
 </form>
</vxml>

(The examples were adapted from W3C VoiceXML 2.0 CR specification document)