What's the purpose of the conversation?

Click the image to listen and answer the questions.
1. Why does Mary introduce herself to Gary?
Garry is at the nurse's station. Mary was told to go to the nurse’s station when she arrived on the ward.
Garry is the new relief nurse. He needs to talk with Judy Mathews.
Garry is the receptionist at the Health Smart agency. He is responsible for checking Mary’s ID.
2. Why does Gary introduce Mary to Judy?
Judy is also a relief nurse from the Health Smart agency. Mary and Judy will be working alongside each other.
Judy is responsible for organizing new staff.
Judy is going to interview Mary for a position at Capital City General.
Exercise: /6