Plausiblity and Dialogue

“We learned about dialogue today in class.” Samantha told her new friend Lindsey.
“Duh, I know I was there, silly lady. You sit next to me and we melded our stories together. Remember we sat next to each other at DFW and you asked me the annoying ‘mom’ questions. But, you know me I like attention and you are a good listener. So we talked about school.”
“Yea, that’s right.” Samantha admitted. “You got HIV, but we all decide it wasn’t plausible. REWRITE.”
“I don’t mind.” Lindsey said “Because I am a writer and that is what I do. And may I remind you, you didn’t know the name of the gallery your first show was in or WHAT YOU TOOK PHOTOS of.” Lindsey smiled. “Gotya!”