Exchanging Currency at a Casa de Cambio

You need to exchange US dollars for local currency at a money exchange shop.

You
Buenas tardes. ¿A cuánto está el dólar hoy?
BWEH-nahs TAR-dehs. ah KWAHN-toh ehs-TAH el DOH-lar oy?
Good afternoon. What's the exchange rate for the dollar today?
"Casa de cambio" means currency exchange shop. They're common in tourist areas and often have better rates than airports.
Clerk
El tipo de cambio hoy es diecisiete cincuenta. ¿Cuánto quiere cambiar?
el TEE-poh deh KAHM-byoh oy ehs dyeh-see-SYEH-teh seen-KWEHN-tah. KWAHN-toh KYEH-reh kahm-BYAR?
The exchange rate today is seventeen fifty. How much do you want to exchange?
You
Quiero cambiar doscientos dólares, por favor.
KYEH-roh kahm-BYAR doh-SYEHN-tohs DOH-lah-rehs, por fah-VOR.
I want to exchange two hundred dollars, please.
Clerk
Muy bien. ¿Quiere billetes grandes o pequeños?
mooy BYEHN. KYEH-reh bee-YEH-tehs GRAHN-dehs oh peh-KEH-nyohs?
Very well. Do you want large or small bills?
Always ask for some small bills ("billetes pequeños"). Large bills can be hard to break at small shops and street vendors.
You
Billetes pequeños, por favor. Necesito pagar en tiendas pequeñas.
bee-YEH-tehs peh-KEH-nyohs, por fah-VOR. neh-seh-SEE-toh pah-GAR ehn TYEHN-dahs peh-KEH-nyahs.
Small bills, please. I need to pay at small shops.