Wow, I have never encountered someone in a fabric store who didn't like to talk about what they were making or going to make. I will always try to strike up a conversation with someone if I am waiting my turn in line to have fabric cut. Most everyone will smile and gladly tell me what they intend and I in turn will let them know about my fabric if I know what it is I am going to do with it. A friendly "Gosh, I just love the fabric and it is the right price, but I really don't know right now which quilt I will use it for", said with a smile, should suffice. A smile and friendly conversation can really make someone's day. You handled the situation as best as you could.....maybe she was just a lonely sole.