"Still, I apologize for knocking into you."

He was half expecting her to run screaming from him, but was pleasantly surprised that she just kept on as if it wasn't a big deal. Perhaps this place wasn't too bad aside from the surprise arrival...

At her question he nodded and replied with a "Yes." Since it was easier than trying to explain what he was all the time when most didn't understand, or thought that because he was mechanical that he wasn't really alive.