"Noodles are okay, I guess," Reiko lied, "I was just...deciding what to have for lunch today, that's all." 
Junko nodded her head saying something like “Oh okay”, but then the conversation lingered, it looked like Reiko seemed bothered by something. 

"More important...I would prefer not to addressed as such. We're roommates, Kuriyama-san, we're not close friends."  

Junko raised an eyebrow at Reiko's rejection to her nickname. Maybe that was too forward for her tastes, Junko thought. “Ah, I see. Well...Ishida-san it is then, if that's what you want.” Her response sounded a little more half-hearted and hiding a little bit of irritation. People were so complicated to understand, and one way or another she always clashed with them. She was also so used to being open with people's names and knowing everyone on a friendly level, but Junko could to survive without it. She cleared her throat and tried to move the conversation somewhere else.

“I love me some good noodles, but I'm terrible at cooking.” Junko laughed, “If you ever need a test taster I'm always hungry.”