Hello @AndreaMichel,
The question you are asking is a great question. However, your model shows that you have a lot to learn about FlexSim. You would benefit from learning from some tutorials. I suggest you do the Process Flow Tutorials and the Task Logic Tutorials. All the other tutorials would also be a big help to you. There is also a really great primer written for students.

To go back to your actual question and your explanation, I find them to be contradicting. Do you want the car to be an AGV and the operator to be the flow item? This would have the car load the person and allow the car to move along the path (You will need to check out the AGV tutorial). If not, then you will want to use a node network (instead of AGV) for the operator to use when moving the car. To learn about the node network check out page 76 of the primer.