In our work with conversational recommender systems we have derived two dialogue strategiescalled interview and delivery. We explorethe symmetry between preferential interview andtraditional clarification questions, and arrive atbasic interview and delivery strategies suitablefor conversational recommender system implementations.The strategies are based on a corpusanalysis of recommendation dialogues inthe movie domain. We illustrate the strategiesin a conversational music recommender systemcalled CORESONG.