He takes the card, looking down at it with curiosity. So what else to do but open it, pulling out the card and taking time to at least read it. He takes the voucher and his face is nothing but bewilderment. He doesn't really know what to say at first, because he's incredibly shocked. The one thing he could never get her to do, that he just didn't have the heart to make her do past the basics he'd taught her so she could at least defend herself properly from any idiot Earth males. He never had the heart to make her train like a Saiyan warrior, after he'd accepted his life on Earth and knowing that he no longer resided in a society of warriors but living with a race of relatively peaceful beings. He didn't want that for her, or else he would have forced her just like he did with Trunks when he was small. But Trunks wanted to, he idolized Vegeta so it wasn't exactly forced.

And here she was, taking the time to spend with him to do what he loved most despite that she had always tried to avoid and get out of training as much as she could. He lowers the voucher to approach her, giving her a nice hug, because that was incredibly thoughtful of her and he most certainly loves his gift. It means a lot to him. He doesn't say thank you but the look on his face certainly displays it.

"So do I get to redeem this now or are you going to make me wait? And just because you're my daughter doesn't mean I'm going to go easy on you!"