curl --request POST \
  --url 'http://localhost:8000/conversations' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "context": {
    "goal": "Plan a 4-day trip to Kyoto",
    "plan_goal": "Plan a 4-day trip to Osaka",
    "plan_update": {
      "action": "advance"
    }
  },
  "conversation_id": "demo-trip",
  "max_tokens": 256,
  "messages": [
    {
      "content": "You are a helpful assistant.",
      "role": "system"
    },
    {
      "content": "Hello! How can you help me?",
      "role": "user"
    }
  ],
  "stream": false,
  "temperature": 0.7
}'

{
  "response": "string",
  "conversation_id": "string",
  "tokens_used": 1,
  "processing_time": 1,
  "metadata": {}
}