Stevie
Jackie doesn't know how to continue conversation.This caused her to fidget more with her fingers trying to calm herself down. There is also the risk of having a coughing fit if she gets to nervous.
Tom
Sunny noticed she was a bit anxious. He questioned himself in what he should do to make them feel relaxed. As he thought, a part of him began to worry if his demeanor brought this nervousness. His own anxiety began to slowly build up as he looked at the table
Stevie
She notices the sudden quiteness of the other and wondered if she did something wrong. This caused her to panick more... Perhaps she should try to talk more...?

"I... Um..."
Tom
He jumped a bit as he looked up. "U-um. Yes?" He tilted his head as he pulled some hair behind his ear. "S-sorry about that. I um, one of those people who... Uh, deal with anxiety like a normal person. Not to say that your giving me anxiety!" He quickly jabbered about, worrying if he sounded a bit rude. "I-it's more that, I have... A hard time. With just being in public areas with a lot of people. I was surprised I even was able to walk over to this restaurant"
Stevie
"I apologize t-too... I don't really know how to talk to people"

The fidgeting started to get quicker.She got more nervous as she thought that perhaps she made him a bit uncomfortable
Tom
"Yeah same here, Usually it's just myself where I live" He sighed as a waiter comes in and places two cups of water on the table. "I work as the head of the battle tower in my region. But trainers hardly come and reach me with all the talented trainers they have to face. So I usually just sit at the top of the tower and look out the window"