If the orange LED lights on your CITATION BAR are illuminated, this means that the microphone is disabled. This happens automatically when you watch TV (so that the TV cannot speak to or operate your bar). When watching TV, you can use the command button on your television to speak to the bar.
If you use the HDMI/Optical/AUX input or 5.1 multichannel surround sound system, press the remote control or the touchscreen to activate the Google Assistant.
Also check out the article witch explains when the orange LED-lights should turn on, you will find more information there about when the Google Assistant should be disabled and when the orange LED lights on the front of the soundbar should be illuminated.