As the man spoke, Dylan took out his badge and showed the man, his wand still at the ready. "As you can see, I'm what I say I am. I'm certainly not playing games and posing as an Auror is illegal. Now you can argue, or you can come along to the Ministry and get the explanations you need," he said. "I'm under orders to bring you, one way or another."
"Now, I'm asking a final time to state your name, hand over your wand and come with me to the Ministry." If that did not work he'd be required to use force, but he'd rather not since the man did not seem dangerous. To make sure he ran a wordless scanning spell over the man, detecting only his wand. It would not be hard to take if he needed to.