Conversation so far:
What is a Goodwill ambassador?
The OCIAA sponsored cultural tours to Latin America and appointed goodwill ambassadors.
What did he do?
In late November 1941, Welles was appointed as a goodwill ambassador to Latin America by Nelson Rockefeller.

Question: Was he good at it?
Self-contained rewrite: Was Orson Welles good at being a Goodwill ambassador?