Lost of passenger

Yesterday (29-aug-2015) my Sister, Kanwal WAS reached at Guangzhou airport at 4 pm according to china time by flight number TG668 Thai airlines and she also had a domestic flight from GZ to Wuhan at 8 pm yesterday but she is out of contact from yesterday and i don't know at which airline used by her for traveling to Wuhan. please help me to find her and tell me how can i know that which airlines she used to travel to wuhan ?