Sir,

I would like to know if the following usage of "would"(I think it's termed as epistemic would) is possible.

If she comes,he would be happy.

(I'm well aware that it's a conditional sentence of type-1)

If it isn't correct why exactly so?

I also would like to know that if "would" in a similar sense can be used in a non-conditional sentence like the following one.

He would be delighted to invite some guests .