1. You can start informally with banter - If I’m calling somebody I know a bit I usually try to start with a little friendly banter. If I know they like a sports team that might be a good start. If I saw their company in the press, heard that they saw somebody at an event that I know, they live in a town where a storm just rolled through – whatever. I think trying to humanize the call from the outset is good. When you jump straight into “sales pitch mode” it feels a bit strange.
Two things to watch for: 1) if you’re trying banter to build rapport  but not “feeling it” then quickly shift to business.  Some people just  aren’t “chit chatters” and prefer to get on with things. I find that  kinda boring, but I know some people are just wired that way.  2) some  callers take this banter too far  It starts to border on disrespectful  of the person’s time or wasteful of your 15 minutes.  Don’t be that  person. Link from Both sides of the Table
