TASK DEFINITION: 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.
PROBLEM: If you fancy to arrive in a restaurant then you should fancy a date .

SOLUTION: If you want to eat in a restaurant then you should bring a date.

PROBLEM: If you want to walk in the rain, bring an umbrella.

SOLUTION: If you want to walk in the exhibition , bring an assignment .

PROBLEM: If you head to have a heart attack then you should be slow .

SOLUTION:
If you want to have a heart attack then you should be fat.