If you keep your promises (and we are sure you always intend to) then you will probably know the person you are promising to well, and they will know you.
Our business audience is usually broad and numerous, but we need to understand each customer just as well as the next. We have to understand their needs and options; the way they work; the way they react and the way they feel about us. We need to know how to influence them and deliver on the expectations we set in order to create a mutually beneficial and lasting bond.
By taking this approach, they know that we are reliable, we do what we say we will do, and we can be trusted to do it again. There is no more solid foundation for business relationships.