Hello, I need help creating a sequence diagram for my IoT$-$based smart lighting system. Below are the details of the system and the specific interaction I need illustrated:

System Overview:

The system allows users to control smart lights using a mobile app or voice assistant.

Users can perform actions like turning the lights on$/$off$,$ adjusting brightness, and changing the color.

Communication happens through a backend server that processes requests and interacts with the light devices.

Scenario to Illustrate:

Use Case: A User uses either the mobile app or voice assistant to turn on a light.

Primary Flow:

The User sends a "Turn On Light" command via the mobile app or voice assistant.If using the voice assistant, it processes the command and forwards it to the Backend Server.The Backend Server authenticates the user and processes the command.The Backend Server sends the "Turn On$"$ command to the Light Device.The Light Device executes the command and confirms back to the Backend Server.The Backend Server notifies the Mobile App or Voice Assistant of success.The Mobile App or Voice Assistant informs the User that the light has been turned on$.$

Alternative Flows:

Authentication Fails:

The Backend Server notifies the Mobile App or Voice Assistant of authentication failure.The App or Voice Assistant displays or announces an error to the User.

Light Device Unreachable:

The Backend Server sends an error message to the Mobile App or Voice Assistant.The App or Voice Assistant informs the User about the issue.

Requirements:

Please include:

Actors: User, Mobile App, Voice Assistant, Backend Server, Light Device.Both Primary Flow and Alternative Flows as described.Visual elements such as lifelines, messages, and alternative conditions $($e$.$g$.,"$if authentication fails"$).$