In the notes from calls left by the Voice Assistant, I found the entry: "No conversation happened." Attached to this note is a recording where either nothing can be heard, or there is traffic noise, or some short beeping sound. The Voice Assistant does not speak at all. The duration of the conversation is given, for example, 7083 milliseconds. Does anyone know what exactly "No conversation happened" means? Why did the Voice Assistant not respond even though the connection was made?