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: climate.set_fan_mode(fan_mode), climate.set_humidity(humidity), climate.set_hvac_mode(), climate.set_preset_mode(), climate.set_temperature(temperature), climate.toggle(), climate.turn_off(), climate.turn_on(), fan.decrease_speed(), fan.increase_speed(), fan.toggle(), fan.turn_off(), fan.turn_on(), lock.lock(), lock.unlock()
Devices:
climate.nest_learning 'Nest Learning Thermostat' = heat_cool;On Low;21C;82%
lock.den 'Den Lock' = locked
fan.guest_room 'Guest Room' = on
user
decrease the fan speed in the guest room
assistant
slowing down Guest Room for you
```homeassistant
{"service": "fan.decrease_speed", "target_device": "fan.guest_room"}
```