Konnichiwa:)
The phrase "Do you want to talk to mom?" is it....
Anata wa okaasan o hanashitai desu ka? (Actually, now when I write this, a few hours later I think it should with the particle "to" meaning with. Eh... i don´t know. The sentence as it is works in google translate.)
or....
Anata wa okaasan to hanashi o shitai desu ka?
oshiete kudasai
Yoroshiku
Dan Fernold
P.S. Oh. And one last thing (for the time being) "Did you want to talk to mom?" "sentence-katta desu ka?" right