Are you in sales? Then do not ask this dangerous question.
How many times has it happened to you that you have gone to a mall to buy yourself a dress and the salesman came forward asking you “how can I help you?”
What was your response? In most likelihood “no, nothing. I am just looking.” “How can I help you?” is both a dumb and dangerous question with a high possibility of killing the prospect.
Because people like to buy, no one likes to get sold. So you can help the customer to buy by saying something like “Sir/madam can I show you some unique collections which I am sure you will definitely like?”