Read the English text first, then check the translation. This reading intentionally brings the unit examples together in context. Note the main idea and two expressions you could use.
Text and translation
What would you do if you found an expensive phone on a train? I would give it to a member of staff at the next station. If there were no staff nearby, I would ask where lost property was handled. I would not try to open the owner's private messages. If someone called the phone, I could explain where I was taking it. That would help the owner recover it without sharing personal information.
ماذا ستفعل لو وجدت هاتفًا باهظ الثمن في قطار؟ لسلمته إلى أحد الموظفين في المحطة التالية. لو لم يكن هناك موظفون قريبون، لسألت عن قسم المفقودات. ولما حاولت فتح رسائل صاحبه الخاصة. لو اتصل أحد بالهاتف، لاستطعت توضيح المكان الذي سأسلمه إليه. ليسهم ذلك في استعادته دون مشاركة معلومات شخصية.