Kili and Laura
Laura wasn't the type to lie. She wasn't planning on starting with Kili. She would lie, yes, but only in dire circumstances. To get herself out of trouble. Talking to the Dwarf would not get herself out of trouble, nor was it a dire circumstance. So, yes, he could trust what she said about Fight Night.
She nodded at Kili's words, "They could be dangerous. You need to watch yourself even during the fights, they could use it to their advantage. Though they would likely not do anything too dangerous during the fights."
"Do you like it here, Kili?" she asked. "It's all a little strange, but it isn't so bad."