Choose the correct, most natural-sounding responses according to the context of the conversation:
SALES ASSOCIATE: Hi, how can I help you today?
SALES ASSOCIATE: No problem. Do you have the receipt?
SALES ASSOCIATE: We can issue a refund to your original payment method. Would you like to exchange it instead?
SALES ASSOCIATE: Let me check… yes, we have a medium in stock.
SALES ASSOCIATE: Perfect. I'll process the exchange now — no price difference since it's the same item.
SALES ASSOCIATE: Of course, here you go. Have a great day!