So, I am given this sentence:
Father will send you a message if his flight is cancelled.
I am supposed to preserve the meaning of this sentence and transform it into another sentence beginning with "Should". So, I thought of this (I don't really know why I thought of this though):
Should his flight gets cancelled, your father will send you a message.
However, some of my classmates are saying that the correct version is:
Should his flight get cancelled, your father will send you a message.
I am confused. Which one is correct and why?