Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.
Q: If you see to fly in an airplane then you should take flying lessons .
A: 
If you want to fly in an airplane then you should take flying lessons.