quite often, the performance of a certain act does not end with uttering a sentence.
.....
another possibility is that she just says nothing because she might not be listening to you but to your younger sister right at the moment. this means, then, that in addition to linguistic form and communicative intention there is one more aspect of speech acts that is of interest to us: what reaction, if any,they cause in the hearers.

고수님들 부탁드립니다. 해석이 잘 안되네요