Surat: An NRG family in California, which is from Surat, is overwhelmed after receiving a letter from US President Barack Obama addressed to their five-year-old daughter. br Concerned over drought situation and strict water conservation orders issued by the authorities in California, Siyona Gujarati, who studies in junior kindergarten in Folsom, California wrote to President Obama. br Obama wrote, "Keep dreaming big and working hard. If you stay focused on your education and on improving your community, I know there are no limits to what you can accomplish.