The agent answering the call.
OptionalendWhy the session ended; set only for ended events.
OptionalexternalThe provider's id of the call, when known.
Which milestone this event reports.
OptionalmetadataThe metadata given when the session was created.
The provider of the call.
The session the event belongs to.
OptionalturnThe completed turn; set only for turn events.
Payload of an AI_VOICE_SESSION_EVENT_TYPE event.