Who is Matti Yadin from By the Rivers of Babylon and what is their importance?

Matti Yadin is Jacob Hausner's assistant. Yadin is a passenger on the 01 Concorde. He is on the plane to supervise the security detail that is aboard. Yadin offers to switch planes with Hauser so that he did not have to fly with Miriam Bernstein. Hausner refuses, on the grounds that it is bad luck to switch planes.