AssistantRequestResponse

Optional response to override assistant configuration or reject call.
xAI Realtime Notes:
When the agent uses xai_realtime, you can still override the configuration dynamically.
The stt_config and tts_config fields will be ignored for xAI Realtime agents.
{
    "assistant_id": "80e53f65-fa68-4d6d-afe4-2f8dee19caed",
    "assistant_override": {
        "first_message": "Hello John, how can I help you today?",
        "stt_config": {
            "provider": "deepgram",
            "model": "nova-3-general",
            "language": "multi",
            "keyterms": [
                "yes",
                "no",
                "okay",
                "Acme"
            ]
        },
        "llm_config": {
            "provider": "openai",
            "model": "gpt-5",
            "voice": "ara",
            "temperature": 0.7,
            "messages": [
                {
                    "role": "system",
                    "content": "string"
                }
            ],
            "tools": [
                {}
            ]
        },
        "tts_config": {
            "provider": "openai",
            "voice_id": "alloy",
            "model": "eleven_flash_v2_5",
            "language": "nl",
            "stability": 0.5,
            "similarity_boost": 0.75,
            "use_speaker_boost": true,
            "speed": 1,
            "style": 0
        },
        "analysis_plan": {
            "structured_data_plan": {
                "enabled": true,
                "schema": {
                    "type": "object",
                    "properties": {
                        "intent": {
                            "type": "string"
                        },
                        "sentiment": {
                            "type": "string",
                            "enum": [
                                "positive",
                                "neutral",
                                "negative"
                            ]
                        },
                        "appointment_booked": {
                            "type": "boolean"
                        }
                    }
                },
                "messages": [
                    {
                        "role": "system",
                        "content": "Analyze the following call transcript according to this schema: {{schema}}"
                    }
                ]
            },
            "min_messages_threshold": 2
        },
        "voicemail_detection": false,
        "voicemail_message": "Hello, this is Acme Corp. We will call you back at a later time. Thank you!",
        "autonomous_silence_handling": false
    },
    "assistant": {
        "first_message": "Hello John, how can I help you today?",
        "stt_config": {
            "provider": "deepgram",
            "model": "nova-3-general",
            "language": "multi",
            "keyterms": [
                "yes",
                "no",
                "okay",
                "Acme"
            ]
        },
        "llm_config": {
            "provider": "openai",
            "model": "gpt-5",
            "voice": "ara",
            "temperature": 0.7,
            "messages": [
                {
                    "role": "system",
                    "content": "string"
                }
            ],
            "tools": [
                {}
            ]
        },
        "tts_config": {
            "provider": "openai",
            "voice_id": "alloy",
            "model": "eleven_flash_v2_5",
            "language": "nl",
            "stability": 0.5,
            "similarity_boost": 0.75,
            "use_speaker_boost": true,
            "speed": 1,
            "style": 0
        },
        "analysis_plan": {
            "structured_data_plan": {
                "enabled": true,
                "schema": {
                    "type": "object",
                    "properties": {
                        "intent": {
                            "type": "string"
                        },
                        "sentiment": {
                            "type": "string",
                            "enum": [
                                "positive",
                                "neutral",
                                "negative"
                            ]
                        },
                        "appointment_booked": {
                            "type": "boolean"
                        }
                    }
                },
                "messages": [
                    {
                        "role": "system",
                        "content": "Analyze the following call transcript according to this schema: {{schema}}"
                    }
                ]
            },
            "min_messages_threshold": 2
        },
        "voicemail_detection": false,
        "voicemail_message": "Hello, this is Acme Corp. We will call you back at a later time. Thank you!",
        "autonomous_silence_handling": false
    },
    "max_duration_seconds": 300,
    "error": "Sorry, we are closed right now. Please call back during business hours."
}