Carnival Cruise Carnival Cruise, How Do I Get A Balcony If They Are Sold Out On Carnival?

Carnival Cruise, How do I get a balcony if they are sold out on Carnival? - carnival cruise

My husband and I are willing to take a Carnival Cruise to take for 5 days in Galveston, Texas, in February 2008. I'm trying to book the cruise, but I know it's a little too late, and made room with balcony. I know that the travel agents or corporate rooms on cruise ships to purchase, do not you? How can I for a particular company or someone with a balcony that I can buy for this 5-day trip?