New Plant, Help

So, I got this plant right before a week long vacation. I left it for a family member to take care of. Neither of us have ever had a Thai basil. He was happy and bright green before I left, and now he’s cranky. Looks dead, but his leafs aren’t crunchy so I’m hoping he can be saved. What do I need to do to bring him back to health and how should I take care of him in general?? #NewPlants #HappyPlants #NewPlantMom #NewGrowth #PlantsMakePeopleHappy