Variable for Telegram message in automations?

I set up a Telegram bot as a notifier for automations. I’d like to use a variable in the message to indicate my presence. For example, have the automation trigger when my device tracker arrives or leaves, then send a message that my presence is “X”. How would I write the variable that shows my presence value?

  - service: notify.your_telegram_service_here
    data:
      title: '🌎 *Location Updated*'
      message: "hatrabbit is {{ states('device_tracker.hatrabbit') }}"

Awesome, thanks.

You can make the message a little nicer than 'not_home' like this:

message: "hatrabbit is {{ states('device_tracker.hatrabbit')|replace('_', ' ') }}"

this will give you hatrabbit is home or hatrabbit is not home