"I'd rather advise Alyosha not to go there," said Elisio.
Alyosha frowned, she felt that something was wrong now. She doesn't know air travel routes just by looking at the clouds from the passenger seat of the plane, but if he pilots the plane and sees the conditions and flight paths firsthand, he will know where he is now.
"Elisio, you didn't tell the pilot to change the route did you?" asked Alyosha.
From Elisio's words earlier Alyosha could understand an implied meaning in those words. Alyosha can understand and read other people's thoughts through the person's own speech.
Either the meaning of what he said was the true meaning, or there was a hint of a lie implied, or indeed the words were completely untrue. Alyosha could tell, at least she had an inkling as to the meaning of those words.