Someone

<?xml version="1.0"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">
<form id="greeting">
  <block>
    Welcome to Mars Colony 7.
    <goto next="#maincontent"/>
  </block>
</form>

<form id="maincontent">

<block>
  Your first day on our colony will be full of 
  surprises. Please don't hesitate to contact 
  us if you get lost.
</block>

<field name="accesscode">

  <nomatch count="1">
    I'm sorry I don't speak Klingon.
    Please just say "yes" or "no".
  </nomatch>
  <nomatch count="2">
    There seems to be a problem with my translator.
    Try one more time.
    <reprompt/>
  </nomatch>
  <nomatch count="3">
    Please go to the nearest manned transporter to 
    receive instructions on using the transporter.
    <goto next="#goodbye"/>
  </nomatch>

  <noinput count="1">
    I didn't hear anything.
    <reprompt/>
  </noinput>
  <noinput count="2">
    To access the community transporter, you must have
    a transporter code.
    <reprompt/>
  </noinput>
  <noinput count="3">
    Sorry, I'm not a mind reader. Please go to the 
    nearest manned transporter for help.
    <goto next="#goodbye"/>
  </noinput>

  <help count="1">
    To move around the colony you will need a code
    to access the transporter beam.
    <reprompt/>
  </help>
  <help count="2">
    When you were booked to arrive at the colony,
    you were issued a transporter code. If you 
    have lost your code, speak the word "guest"
    at any transporter and a new one will be issued.
    <goto next="#goodbye"/>
  </help>

  <prompt>
    Do you have a community transporter access code?
  </prompt>

  <grammar>
    <![CDATA[
      [yes no]
    ]]>
  </grammar>

  <filled>
    <if cond="accesscode == 'yes'">
      <goto next="#goodbye"/>
    <else/>
        Your access code is the word "guest".
        <goto next="#goodbye"/>
    </if>
  </filled>
</field>
</form>

<form id="goodbye">
<block>
  <prompt>
    Enjoy your stay. Goodbye.
  </prompt>
</block>
</form>

</vxml>