Rose is nervous about answering it initially, since she had noticed him being unusually quiet than most days. She can understand why her master didn’t want to bother him (he is pretty busy right now), but at the same time, she does want to do something to help him.

So she quietly squeaks with concern, with the squeaks meaning to say that she is wondering if he is doing alright for the day. Meanwhile Harry is trying to not get distracted by her squeaking while juggling cafe patrons’ orders and running the cashier.