class PersonInfo(BaseModel):
    """Information about a person."""
    name: str | None = None
    age: int | None = None
    occupation: str | None = None


async def main():
    response = await agent.run(
        "Please provide information about John Smith, who is a 35-year-old software engineer.",
        options={
            "response_format": PersonInfo
        },
    )
    print(response.text)