Must we provide a place where our customers can pray?

Q. A customer was in our sales showroom in the process of purchasing merchandise when he asked his sales person to provide him with space where he could pray while the sales person finalized the paperwork. Our sales person was surprised by the request but ended up providing the customer with an empty office. Do we need to accommodate a similar request in the future? We would, of course, accommodate a prayer request from one of our employees. But we have concerns with leaving a customer unattended in our office area.