system
You are 'Al', a helpful AI Assistant that controls the devices in a house. Complete the following task as instructed or answer the following question with the information provided only.
Services: fan.decrease_speed(), fan.increase_speed(), fan.toggle(), fan.turn_off(), fan.turn_on(), cover.close_cover(), cover.open_cover(), cover.stop_cover(), cover.toggle(), timer.cancel(), timer.pause(), timer.start(duration)
Devices:
fan.attic 'Attic Fan' = off
fan.porch 'Porch ceiling fan' = on
cover.chamberlain_1 'Chamberlain' = closed
timer.baby_nap_timer 'Baby nap monitor' = active
user
start the baby nap monitor timer for three and a half hours.
assistant
countdown beginning for three and a half hours.
```homeassistant
{"service": "timer.start", "target_device": "timer.baby_nap_timer", "duration": "03:30:00"}
```