I wonder how many businesses lose sales because their staff cannot handle an enquiry to buy something when you ring them or walk in to their store. Marketing costs make it expensive getting prospective customers to ring you or walk in so why waste that money by missing sales when you often only get one chance to make a sale, at the initial point of enquiry from that potential customer. You no doubt have plenty of competitors the customer can go to if they do not get a good response on the first try.