Please design a marketing message that embeds the concept of nostalgia and another factor that can potentially moderate the effect of nostalgia to increase consumer desire for post-pandemic travel. Your idea should be ORIGINAL. Specifically, please address the following aspects: • What can be the second factor (moderator) that you think can moderate the effect of a nostalgic marketing message? Briefly justify why. • How to manipulate the two independent variables? • How to measure the dependent variable? • Briefly write the procedure of the study.