This is a very personal decision, and engages way too many factors to answer without knowing both people involved and the dynamics between them. Key things to explore are how friendly, clear, persistent (in a nice way) and collaborative are you in your requests, and how open, interested and collaborative is the other person? How much energy do you each of you have towards continuing to try? What does the behavior in question mean to each of you, how important is it to each of you and why? These are just some of the things to understand in more detail.