I’m going that way?”
If you want to do the chessed, it’s not a lie, because in order to do it, you ARE going that way, even if it was not your original intention. What do we say, “Baderech asher rotzeh odom leileich, molichin oso.” Or domething like that. Hashem finds a way to help someone who wants to do chessed, to accomplsih a chessed,even when he did not know about it in advance.