You’ve said your goodbye’s but now your friend/partner has kept you waiting and waiting do you have to say your goodbye’s again? According to my legal consultant it’s not necessary but maybe this isn’t a legal questions but one of etiquette. For how much time has to lapse before your initial goodbye gets swept under the rug. Luckily your Hebrew brothers and sisters can provide you a solution “Shalom” which is Hello, Goodbye and peace. So if you’ve said Shalom when you thought you were leaving it can be hello again or just plain peace and when you leave you can say that Shalom changed to goodbye. This also works if someone doesn’t speak Hebrew because they’ll have to figure out what the hell you said anyway.