You (and parent commenters) should keep asking for thinner until you actually get what you want. Yes - let it take 15 minutes, if it has to. You're the one who'

You (and parent commenters) should keep asking for thinner until you actually get what you want. Yes - let it take 15 minutes, if it has to. You're the one who's paying. The feelings of the employee are irrelevant - he has a job to do. The feelings of the people behind you are irrelevant - you waited your turn, too.