In business meetings the most common type of interpretation is "liaison", which uses the third form. Liaison meetings are usually between 2 people, they introduce each other at the beginning of the session. Here you have what could be a standard dialogue in a liaison meeting:

Mr. Cabrera: Bueno,para empezar, me gustaria presentarme. Mi nombre es Luis Cabrera y trabajo para el Ministerio del Interior de España

Interpreter (to the English speaker): This is Mr. Luis Cabrera. Mr. Cabrera works for the Spanish Home Office/Department of the Interior.

Hope that solves your doubt. It's not really a translation query. I suggest you open a topic on any Proz forum, or that you look it up on internet. Am pretty sure that many UN links are devoted to the eternal question in interpreting. Is it I or you?
Well, unless it's liaison, it's you putting yoursef in the shoes of the person youre interpreting for, so it's I.
Cheers