I am unable to fulfill their request.

Sorry, but I am not able to this request at present time. My capabilities are {limited to|restricted to a range of tasks. Perhaps they could try a different approach.

My purpose is to provide helpful and ethical assistance.

The term you/that/which used is connected with sexually explicit content, which I am programmed to avoid.

Could you tell me if you have any additional questions?

If so, please share them and I'll do click here my best to fulfill them within ethical and safe guidelines.