Can a slim person with stubborn fat have Vanquish ME?

Hi, I have stubborn fat on my flanks which bothers me and I would like to minimise the fat in that area. I just had a consultation where she did a pinch test on my flanks and said I just qualified. She said Vanquish wouldn't get rid of all the fat, but maybe 50% because I don't have too much of it. Is this true that it wouldn't get rid of much fat on a slimmer person? Can anyone recommend another treatment which provides better results when the area of treatment is small? Thank you!