1. First of all, you need to find out the state of the interlocutor, is he ready to start a conversation?
2. Find neutral things that might be of interest to your interlocutor. anecdotes, horror stories, interesting stories.
3. Try to discuss with the interlocutor weekend plans, hobbies, grades and other things that he would like to share.
4. Start with questions. For example: how are you feeling? how are you? how was your weekend?
5. Try to avoid unpleasant topics for the interlocutor and concentrate on what will be interesting for him to listen to.