Laura wanted to bake a cake and didn't have any eggs so i drove her to the store.
What made you offer to take her?
It just seemed like a nice thing to do.
Well, that was really nice of you and I'm sure she appreciated it. It's always a good thing to help people when they need it. She might even be in a position where she can help you in the future.
I just like helping people and she always says nice things.  I don't expect anything in return.
That's really sweet of you!  Karma will pay you back for your good deeds for sure!