Department Stores in Downtown Chicago

"After having spent hours online trying to find where to buy sterling silver trays, Theresa Carter of The Local Tourist, sent me an answer by return email.  (I'm still waiting to hear from the emails I sent to the stores directly.) I live in Switzerland and will be in Chicago for a few days and don't want to waste time going to stores which do not carry what I need, since I'd like to see some of the sights, too. Theresa's service is a great time-saver for tourists and I can recommend it whole-heartedly." - S. Meyer, Switzerland