// Simple text response
const message: ChatCompletionMessage = {
  role: "assistant",
  content: "Hello! How can I help you today?"
};

// Response with tool calls
const toolMessage: ChatCompletionMessage = {
  role: "assistant",
  content: null,
  tool_calls: [{
    id: "call_123",
    type: "function",
    function: {
      name: "get_weather",
      arguments: '{"location": "San Francisco"}'
    }
  }]
};