curl --request POST \
  --url https://api-west.millis.ai/phones/{phone}/agent-config-override \
  --header 'Content-Type: application/json' \
  --header 'authorization: <authorization>' \
  --data '{
  "prompt": "<string>",
  "voice": {
    "provider": "elevenlabs",
    "voice_id": "<string>",
    "model": "<string>",
    "settings": {}
  },
  "flow": {
    "user_start_first": true,
    "interruption": {
      "allowed": true,
      "keep_interruption_message": true,
      "first_messsage": true
    },
    "response_delay": 123,
    "auto_fill_responses": {
      "response_gap_threshold": 123,
      "messages": [
        "<string>"
      ]
    },
    "agent_terminate_call": {
      "enabled": true,
      "instruction": "<string>",
      "messages": [
        "<string>"
      ]
    },
    "voicemail": {
      "action": "hangup",
      "message": "<string>",
      "continue_on_voice_activity": true
    },
    "call_transfer": {
      "phone": "<string>",
      "phones": [
        {
          "phone": "<string>",
          "description": "<string>"
        }
      ],
      "instruction": "<string>",
      "messages": [
        "<string>"
      ]
    },
    "inactivity_handling": {
      "idle_time": 123,
      "message": "<string>"
    },
    "dtmf_dial": {
      "enabled": false,
      "instruction": "<string>"
    }
  },
  "first_message": "<string>",
  "tools": [
    {
      "name": "<string>",
      "params": [
        {
          "name": "<string>",
          "required": true,
          "type": "<string>",
          "description": "<string>"
        }
      ],
      "description": "<string>",
      "webhook": "<string>",
      "header": {},
      "method": "<string>",
      "timeout": 123,
      "run_after_call": true,
      "messages": [
        "<string>"
      ],
      "response_mode": "strict",
      "execute_after_message": true,
      "exclude_session_id": true
    }
  ],
  "millis_functions": [
    {
      "name": "<string>",
      "description": "<string>",
      "data": {
        "param": {
          "description": "<string>",
          "name": "<string>",
          "required": true,
          "type": "<string>"
        }
      },
      "type": "<string>",
      "messages": [
        "<string>"
      ],
      "response_mode": "strict"
    }
  ],
  "app_functions": [
    {
      "name": "<string>",
      "credentials": {}
    }
  ],
  "custom_llm_websocket": "<string>",
  "language": "ln",
  "vad_threshold": 123,
  "llm": {
    "model": "gpt-3.5-turbo",
    "temperature": 0,
    "history_settings": {
      "history_message_limit": 123,
      "history_tool_result_limit": 123
    }
  },
  "session_timeout": {
    "max_duration": 123,
    "max_idle": 123,
    "message": "<string>"
  },
  "session_data_webhook": "<string>",
  "privacy_settings": {
    "opt_out_data_collection": true,
    "do_not_call_detection": false
  },
  "custom_vocabulary": {
    "keywords": {}
  },
  "extra_prompt_webhook": "<string>",
  "switch_language": {
    "languages": [
      "<string>"
    ]
  },
  "knowledge_base": {
    "files": [
      "<string>"
    ],
    "messages": [
      "<string>"
    ]
  },
  "speech_to_text": {
    "provider": "deepgram",
    "multilingual": true,
    "model": "<string>"
  },
  "call_settings": {
    "enable_recording": false,
    "background": {
      "url": "<string>",
      "volume": 123
    }
  },
  "memory": {
    "user_identifier_key": ""
  },
  "timezone": "<string>"
}'

{
  "success": true
}