D..
Time to start teaching her HOW to answer you. If you are near the university, see if they have a children's program you can make use of and let your child be part of it. Many of the college students who are trying to learn how to teach young children, or grad students studying speech pathology, do this.
I did not have your problem with my kids. I did have a child with severe speech difficulties, but he certainly knew his name. I would encourage you to address this now because it will really help your child. Speech therapy isn't just about how to make sounds. Its also about language development and that is very important.
Good luck,
Dawn