Ash can see that Chloe is having some difficulty with this and he feels bad there's not much he can do. However, he can always be kind and lend a hand and that's exactly what he intends to do.

"Vermillion, huh?" What a coincidence that they're both from the Kanto region. "Nice to meet you, Chloe and Eevee. I'm sure we'll be good friends!"

"Pika? (Galar?)" Pikachu tilts his head at Eevee. He's not sure he's heard of that region before. Maybe Professor Oak mentioned it in passing once? "Pikachu pika pi pikpika pikachu chu pika. (We had just gotten home from the Kalos region.)" He supplies.