Hope you coose to smile.

God gives you a face , but it is up to you what  expression you choose to put on it.

When you smile it makes others smile. People can hear it in your voice when you talk on the phone. Your smile changed the tone in your voice.

When you smile it makes you feel better about yourself, in return makes others feel better about you and themselves.  

Your smile makes others trust you. If you are trying  to build a business relationship you really need to establish that trust, so why not do it with a smile.