If your air conditioner has a built-in voice module, you can simply speak to wake it up and control it with your voice.
You can also easily add voice control by using an external device like a smart plug. Just connect the plug to your AC, and you're ready to go.
To use popular voice assistants, please set up your air conditioner with either Google Assistant or Amazon Alexa. Once linked, you can control your AC using voice commands through those services.