I feel embarrassed when I am doing sales and running business. What should I do?

The correct attitude is to speak out your products, and he will talk to you about the next step if necessary. When both parties are satisfied, the transaction is concluded. He just needs to buy, you just need to sell. It's convenient for him to stay at home. You earned it hard. The money you take is given by your boss, and it has nothing to do with your clients. He bought it because he needed it, not because he cared about you, so you just need to introduce it carefully and generously. It's like asking someone to buy it, and people will be grateful if they buy it. Customers don't need to say goodbye politely, don't pester them, remember: customers buy products because they need them, not because of your smile, and they buy products not because of your rhetoric. All you need to do is introduce the product clearly. Books are divided, and whether to add fake or not is the customer's own consideration.