The better you are known by customers and prospective customers the more you control your territory. Dogs do not have problems expressing affection in public. Let your clients and prospective clients know how much you care. The simple remembering of some previous personal bit of news they shared with you the next time you meet somewhere expresses that care. Dogs miss you when you're gone.
Dogs are very direct about wanting to go out.
Your customer might play games with you. They might throw you a buying signing by asking for more information. Or they might give you the go ahead on an order and later cancel. If you go fetch for these, note your reaction. Examine your reaction s appropriateness to the situation.