What's the Schema for an intangible service like insurance or shipping?

I see how to set a schema for a tangible, but what if I am not selling a
tangible. Does Schema.org consider a service like "insurance" a tangible? I
confused because http://schema.org/Offer shows products, not services.
Thing>Intangible>Offer only shows products, not services (insurance,
shipping, massage).  Any help would be great.

www.shipoverseas.com