Choose the correct, most natural-sounding responses according to the context of the conversation:
BANK TELLER: Good morning! Welcome to First National Bank. How can I help you today?
BANK TELLER: No problem. What currency would you like to exchange your dollars for?
BANK TELLER: Sure thing. The exchange rate today is 0.91. There's also a small fee for the transaction.
BANK TELLER: It's a flat $4, no matter the amount. How much would you like to exchange?
BANK TELLER: Of course, I can give you a mix of small bills. Could I see your ID or passport, please?
BANK TELLER: Perfect, thank you. Here's your cash, a receipt, and your passport back. Have a great day!