Hi Wendy!
Absolutely! You should always be persistent in trying to set up your Advance Dining Reservations at Disney. There have been many times where my first choice restaurant was unavailable, but by being flexible and persistent, I was eventually able to get in.
Each day, either call Disney Dining at 407-WDW-DINE or check online
here. Reservations are changing all the time as people rework their itineraries or change their minds.
If all else fails, and you find yourself in Epcot without a Le Cellier reservation, it never hurts to ask at the podium. If you can be flexible and be there at the start of lunch or dinner hours, or after the mealtime rush has ended, you'll increase your chances of finding a table available. Our favorite time to dine at Disney is for a late lunch - its wonderful to get out of the heat, and get a nice break late in the afternoon! Plus then we're fully recharged and ready to hit the rides while the crowds are at dinner!
Hope you can get your reservation! Yum!