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.

If you want to switch cash then you should have the underlying change .
If you mind to pay cash then you should have the right proof .

You are nice to find a bank in a financial center .
You are likely to find a bank in a financial establishment .

A stranger can assurance that her testimony is telling the truth .

A detective can conclusion that her student is telling the boy .