def transform_data(data):
    id_value = 1  # You may assign the 'id' value, here I have used 1 for simplicity.
    result = {'id': id_value, 'conversations': []}

    for key in ('instruction', 'output'):
        if key in data:
            origin = 'human' if key == 'instruction' else 'gpt'
            result['conversations'].append({
                'from': origin,
                'value': data[key]
            })

    return result