no prob if 2 different locations, actually, it should never be a prob for you (or for me!) but, since i know all of the SAs at Saks and NM in the Chanel dept., sometimes it gets sticky.....the way I handle it is "one sale for you and one for her and one for that one and one for this one..." LOL (this is over a period of time.....)
then they feel like i'm not favoring any (unless one does such outstanding service that she/he DESERVES to be the fave SA!)
for instance, Grace at the NM in Ft. lauderdale will ALWAYS be the only one i deal with...they don't even have a Chanel purse dept there but she goes out of her way to find Chanel bags for customers, me included, by calling NMs that do!