Help - Restaurant Recommendations - Saturday & Sunday lunch

Hi

We%26#39;re going to Paris in 2 weeks%26#39; time to celebrate my boyfriend%26#39;s birthday - we%26#39;re both mid-30s, appreciate good food.

Trying to find a restaurant for celebratory lunch either on Saturday or Sunday.

Preferably french cuisine, either modern or traditional. Preferably somewhere which has a sense of occasion but isn%26#39;t extremely formal (ie nowhere with a strict dress-code)

Location not massively important. We%26#39;ve been to Paris a number of times before so don%26#39;t have heavy sight-seeing schedule, so we can plan our day around lunch if necessary.

Given it%26#39;s in two weeks%26#39; time, we%26#39;ve probably left it too late for a reservation at the hot-spots, but somewhere semi-hot or lukewarm maybe...!