I used to work at a bank and we had something similar in reference to customer service: SHINE. Smile, Handshake, can't remember the I, say your Name and use theirs, and E for eye contact. Anyway, when you actually put it into practice, it worked 90% of the time. People can be dicks and have their guard up and using that would actually make them pleasant to be around. It's all about application and belief sometimes.