describing a person

Please help me find my friend!  This is the first time we come to the USA.  The third day after we arrived here, my friend got lost when we took a walk in the Central Park.  He is middle height with long, yellow, straight hair.  He also wears a pair of white glasses.  Besides, what he wears are a hat, a blue T-shirt, a pair of jeans and a pair of sneakers.  On his face are a lot of pimples.  If you see he , you can find he carries a big backpack.  Because he doesn't have a cell phone, we can't contact each other.  The worst of all, he has just 13 dollars with him so that he may have no place to stay at.  So, if anyone who have seen him, please call me as soon sa possible.  My cell phone number is 0933333333.  Thanks a lot.