For your first question, the correct excerpts that is structured correctly is,
"She wants to go outside... and walk the dog," Jesse said.
Always finish your though before finish of the sentence with in your case. "Jesse said"
For the second question, it's done perfectly, but reading it over I think you should take the last word or Sam, in the sentence "Sam, are you okay?" asked Jean as she ran to help Sam." Maybe but a her instead of "asked Sam?" I don't know, that's just me, it just sounds more right. Although, you can still keep Sam in instead of her or just "ran to help", otherwise everything is great!
Hope this helped!