There is silence for a while until Izna utters softly, "Sorry."
It's with regards to several things—for the noise she caused with her own argument despite promising she would keep it down during the mornings and afternoons when it's their only opportunity to catch any rest or relaxation before the crowd comes in at night.
Otherwise, it's her way of showing condolences for the argument from that morning—the contents of which Hinata would not like to think about.
He hopes their words weren't distinct for the sake of their privacy though, at this point, the questionable state of their relationship has been picked up on even by the most stranger out of their four-person travel entourage.
One person would not make much of a difference.
"I spoke to them about the restaurant refurbishment. They want to help out. Shoma too."