Just a suggestion to those that have had the experience of the short answer "no" in response to direct questions. Do you have X is a very direct question which when answered doesn't leave a lot of room for conversation. Think about the number one H question, do you have any Bs or Ks? Yes or No
I speak from experience working on the floor in stores (not H), if you want to engage the SAs and get them to provide information and service, it needs to be a conversation that can go somewhere. Instead of "do you have X?", how about "I saw this X and loved the shades of pink, style of design, shape of bag etc-do you have that item and anything similar you can show me?" it opens up a completely different style of conversation-in my experience leads to SAs showing more products, showing clients around the store and so on.
I realize language can be a barrier to some conversations and I offer this as a suggestion to those who have found they've been "shut down" when asking for a specific item at H. Ask for information, leave room for them to show you other things and you may find those good SAs who are fun to shop with. I don't doubt there are plenty of cold, rude SAs who aren't interested but I believe in a commission based sales team, they're motivated to cultivate clients but conversation works both ways so leave them an opportunity to tell you what else they have. They may just think that's all you want and say No. H doesn't exactly have the same inventory in every store so they likely say No a lot during the day.