The state of the verbal conversation between the end-user and the VPA.
The VPA is idle. If its service requires authentication and the client has been authenticated, then the VPA is ready for the end-user to trigger the start of a conversation.
The VPA knows that a dialogue has started and is actively listening for speech.
The VPA is listening for audio and can hear the end-user speaking.
The VPA is waiting for the end-user to respond with speech. This can occur when the VPA asks the end-user a question.
The VPA is busy with a request. This can occur when the end-user has asked VPA for something and the VPA has connected to an online service to find the answer.
The VPA is speaking to the end user.
The VPA is in an error state and cannot be used for conversation. The error may be temporary, for example, the user is not logged in.