"Hello, Sir. Here's what's happening. I don't know you, but I need something from you, so here I am. Now I'll find out if you're of any use to me. But don't worry. I believe in you. ... Hmm, you seem a bit weirded out by that. How can I help?"
Originally posted by vandervelde https://smallbusiness.yahoo.com/advisor/19-words-people-more-140000312.html
Not just in every corner of the world.
Food Lion Inc used a similar set of phrases. When a customer asks you something, and you don't know the answer you say "I'll find out" rather than "I don't know."