You shouldn't use people.
Julie got her license suspended and now she is not allowed to drive.
Julie needs to find a way to work.
Julie tells Pat that she needs a ride to work, would be very grateful for the help and offers to pay for gas.
Julie asks her coworker Pat for a ride to work every day but doesn't offer to pay for gas or even thank her.
Pat tells Julie that she would be happy to give her a ride and appreciates the offer for gas money.
Pat feels that Julie is taking advantage of her because she goes out of her way to help her out.