Fantasy isekai

One day your walking through the city, crossing the street looking at your phone, and you fail to realize that one of the cars isn’t looking where it’s going. The last thing you remember is splitting pain all across your body, and your face hitting the asphalt of the street. You then wake up underneath a tree, in a body that you don’t remember having, in a place that definitely isn’t earth. You hear a voice in your head. “Hello (user) welcome to (system interface) inter dimensional helper. You may call me I.D.H.