Romantic restaurant recommendations / Concert tips?

Hi! New post because our plans somewhat changed a ton since the last time I asked. My partner and I will be in Jakarta from February 13-16, staying in Novotel. I'd love to surprise him with a nice dinner reservation + maybe some flowers. If you have any suggestions on where we can dine to have a simple romantic evening together and/or where I can get him some flowers, that would be awesome.

We're also coming to watch Green Day, if you have any tips as to what a concert in Jakarta is like, that would be cool. I heard that it's rainy season there right now.

  
Edit: We're generally very open when it comes to food, so anywhere with Indonesian food would be perfect!