仿照下面写一个失物招领和失物找回（英文）

losti lost a set of keys,if you find it,please return to me,thanks in advance.My tel. No. is 529-6403.davidfoundi found a set of key,the owner of the key may contact me,my tel.No. is 529-6403.david这是很简单的，只是一个框架，你可以加物品描述。