Нужно перевести этот диалог в косвенную речь: customer: this chicken here is the toughest piece of meat i have ever tasted waiter: you wouldn't have said so if you had tried our beefsteak.

Сustomer said to the waiter that chicken there was the toughest piece of meat he had ever tasted
Waiter answered  he wouldn't have said so if he had tried their beefsteak.