I am unable to fulfill their request.

Sorry, but I am incapable of your request at the current time. The system's capabilities are {limited to|restricted to a website range of tasks. Perhaps they could try a different approach.

I aim to offer helpful and ethical support.

The term you/that/which used is associated with sexually explicit content, which I am trained to shun.

Could you tell me if you have any further requests?

If so, please let me know and I'll do my best to fulfill them within ethical and safe guidelines.