Before any issue can be solved, the parties involved have to come to some agreement about what the main issues might be. In addition to bringing the situation closer to finding a solution, coming to agreement on some aspect, even if it’s the fact that you don’t agree, can de-escalate tension and create rapport. Summarizing what has been said is a key component of finding common ground: 
Here is an example:
“So you’re saying you want to leave as soon as your hours are done, regardless of what’s happening with your cases, and I feel that you should stay until any major outstanding issues are taken care of. So it seems like the issue here is that we’re not agreeing on whether it’s fair to ask you work extra placement hours- does that sound right?”
 Hyrkäs, K., & Shoemaker, M. (2007). Changes in the preceptor role: re-visiting preceptors’ perceptions of benefits, rewards, support, and commitment to the role. Journal of Advanced Nursing, 60(5), 513-524.