[She can't help but smile back- it's infectious. Between the hand holding and the grin, it's impossible for her to be really down about anything. At their question, she nods, keeping their hand in hers.]

Of course! I'm just, uh, g-going to the Lab for a bit. I was hoping to poke around with some stuff, uh-- if that's not any trouble for you.

[She has no idea what they were doing or looking for before they found her. Maybe it was nothing. Maybe they were just hoping for some company. Either or, it's fine by her.]

Or I can come with you to wherever you were going. Uhm, if that's better.