VCD.xml

<?xml version="1.0" encoding="utf-8"?>
<VoiceCommands xmlns="http://schemas.microsoft.com/voicecommands/1.2">
  <CommandSet xml:lang="en-us" Name="CommandSet_en-us">
    <AppName> Bot World </AppName>
    <Example> Bot World, I want to play </Example>

    <Command Name="checkScore">
      <Example> Bot World, Did anyone beat me? </Example>
      <ListenFor RequireAppName="BeforeOrAfterPhrase"> Did anyone beat me </ListenFor>
      <Feedback> Yes.</Feedback>
      <VoiceCommandService Target="BotWorldVoiceCommandService"></VoiceCommandService>
    </Command>

    <Command Name="startPlay">
      <Example> Bot World, I want to play </Example>
      <ListenFor RequireAppName="BeforeOrAfterPhrase"> I want to play </ListenFor>
      <Feedback> Get ready! </Feedback>
      <Navigate/>
    </Command>
  </CommandSet>

</VoiceCommands>

Original is here
https://digitalerr0r.wordpress.com/2015/10/21/voice-activating-your-windows-10-games-using-speech-synthesis-voice-recognition-and-cortana/