Thanks for the question.
Depending on the model of your iPod touch, it may be compatible with Siri. The following article outlines what products support Siri, and answers basic questions about the service:
Siri is the intelligent personal assistant that helps you get things done just by asking. It allows you to use your voice to send messages, schedule meetings, place phone calls, and more. But Siri isn't like traditional voice-recognition software that requires you to remember keywords and speak specific commands. Siri understands your natural speech, and it asks you questions if it needs more information to complete a task.
Siri is available on these devices:
- iPhone 4S or later
- iPad 3rd generation or later
- iPad mini
- iPod touch (5th generation)
Siri is currently in beta and we'll continue to improve it over time.