Assume that you are a Rolling Stones fan.The stones are in the United states for a concert tour. You are extremely anxious to attend a concert because,given Mick Jagger's age,you fear that this may be your last chance to see these vintage rock-and-rollers. A friend promises you tickets to the show, and you of course are elated.Two days later,your friend calls to tell you he is taking an 'old flame' instead of you. As you hang up,your anger and disappointment cause you to think about suing your friend.After all,you had an agreement,and he has broken a promise to you. You may think you deserve to collect money damages for the harm you have suffered.