Conversation so far:
What is the UNHCR?
The United Nations High Commissioner for Refugees (UNHCR) is a United Nations programme with the mandate to protect refugees
When did Angelina Jolie become an ambassador of the UNHCR?
Jolie was named a UNHCR Goodwill Ambassador at UNHCR headquarters in Geneva on August 27, 2001
Was Angelina Jolie invited to become an ambassador of the UNHCR ?

Question: What did she do as an ambassador?
Self-contained rewrite: What did Angelina Jolie do as an ambassador of the UNHCR?