Just a general rant here and a bit of advice....If you are going to ask another nurse to switch shifts with you, you need to be prepared to do him/her the same at some point in the future. Chances are you are screwing up what they thought their schedule was going to look like by your request and they were nice enough to do it anyway because you are in a pickle. Its called doing you a favor. Generally speaking it is good manners to understand you need to do the same when/if the time comes, even if it is not completely your favorite timing for it.Once, I understand. Twice, I am getting a little miffed. Third request with no reciprocation the answer will be no forever after. Whether I have something going on or not, whether I like you or not. Fair is as fair does. Don't expect someone to keep being your go-to person if you aren't ever going to be theirs.