If she doesn't have a lot of expreience with birds I'd suggest a male cockatiel or budgie.

Other good ones that might be a bit more challenging tht I can think of....

Senegals: Not the BEST talkers, but they do talk a bit. They're small, and they tend to bond very closely to ONE person. They'll tolerate other people, but they bond most with one.

Green-Cheek Conures: VERY CUTE! They have soft little voices that can be hard to understand if you aren't listening closely. They're very sweet, although conures can be a bit louder than some people like.

Male Parrotlets: You're not guaranteed a talker, but they are SWEET, playful, silly, and all-around awesome. (I'm a bit biased because they're my favorite bird!)

Moustache Parakeets: Pretty little birds, a bit better talkers than budgies. Friendly, and less active than a lot of birds.

I can think of a few more, but I'll leave the list there for now. I can answer any questions about any of these, but PCB knows WAY more about 'tiels than I do. We don't carry tiels at work.