Q: I have a non smart phone,how i can transfer my contacts from a non smart phone to iPhone?Can any nearest iPhone store help me with the same?Do I need to carry anything?

One method is to import the contacts from the sim card of the old phone. The iPhone doesn't store contacts on its sim card but it can import them. If the sim card doesn't fit, your cellular provider can copy the contacts to a sim card that does fit. More information: Import contacts from your SIM card to your iPhone - Apple Support

Your carrier may also be able to assist you. Verizon, my carrier, has a machine at their corporate stores that will transfer contacts from basic phones to other phones. A common brand name is Cellbrite.