I think it is depend on the company you apply for not every HR can speak english very well. Or may be they just want to see how confident you are to speak english dint mean to interact with your conversation. Long ago when I had job interview with 5 star hotel in bkk HR asked me to introduce my self and tell her about my life in english but she dint interact with my talking at all. But I know that her english is quited good as I heard she speak with the boss.