The context of the following conversation is Kai told Sydney the direction, despite that she was lost:
Kai says I really can't understand why Sydney doesn't get a navigation system..
The friend responds Can't believe she doesn't have one!.
Kai responds Well, I gave her the directions, but she still got lost on the way there..
The friend responds I supposed we need to tell her, that a navigation system would change her life..
Kai responds Exactly! They would even help her with her driving. Those things even tell you what lane to be in at a stoplight!.
The friend responds I know. I can't live without mine!.