Let's say the customer is shopping in a furniture store and they only speak Chinese.
If I approached & said 你需要帮助吗? 好的, 如果你需要某物, 告诉我. would it sound natural? (Assuming tones/etc are good).
Basically I'm trying to say: Hello, do you need any help? If you need any assistance, let me know!
"你需要帮助吗? 好的, 如果你需要某物, 告诉我." sounds natural if you are responsible for the promotion of a specific line of merchants, such as electronic items, cosmetics, or apparel .... Otherwise, in general, you can simply say,
Or, simply replace 某物(a specific item) with 什麼(anything in the store) in the original sentence.
