Can I talk about sports?
Yes, it's a good small talk topic!
Can I give them my address?
No, they are strangers.
Can I give my phone number to a customer?
No. You can give them the store/office number.
Can I ask them how's their day going?
Yes.
Can I talk about the product that we sell in the store?
Yes! you can recommend or say good things about the products in the store.
Can I talk about my body or health?
No
Can I ask if they need help finding something?
Yes!
Can I talk about the weather?
Yes! it's a great small talk topic
Can I talk about how much money I have?
No, that's private.