ABC News' Sunlen Miller Reports: As speculation swirls about his vice presidential pick, Sen. Barack Obama enjoyed dinner with the family including his wife, Michelle, and two daughters."Where's the text?" reporters shouted while holding out cell phones to get the presumptive Democratic nominee's attention as he walked into Roy's in downtown Chicago.At first, Obama, D-Ill., acknowledge the press but after some louder shouts, he relented and looked over with a laugh. As he left, the intrepid band of reporters following Obama's every move tried again."How's Obama-Biden sound?" reporters yelled. "See ya guys!" Obama replied.The candidate has since returned to the Park Hyatt hotel in Chicago where aides advise he will burn the midnight oil, preparing for his nomination acceptance speech next week at the Democratic National Convention.