Yes. As I mentioned in one of your questions earlier, the matchmaker comes twice a day (12:30 and 4:30) at ages 5, 6, 7, and 8. At around age 9 (assuming that you didn't pause), your Tamagotchi evolves into an Oldie and during those regular matchmaker times, your character will get mail instead of a mate. After a couple of days, the matchmaker resumes her visits, so Oldies can still find a mate.