We use bells, but Luna will come and talk to me if I am around... more like she will use the bells to make sure I listen to her, but if I am around, she will come and make all this cute sounds until I ask her, do you want to go out??? then she barks, and there we go...
It is crazy but I find myself talking to my dogs a lot!! and the weird thing is they talk to me back!

Yorkies are very very smart (sometimes too smart!), and can be trained as you wish, but also have a very stubborn mind of their own, and can make decisions by themselves! If the pooch decision is the same as yours, you are lucky, if not, well, you better be patient!