Main thing is to have your freon level checked.
Most ac systems will leak freon even though they are new.. most of the loss is through the seals which tend to dry and crack with age.
If thats okay wash the condenser with a high pressure garden hose when the car is cold, (usually located around the radiator in front of car), if this is blocked it will not allow the freon to cool correctly.
If that don't help wash the evaporator, you will have to by a special coil cleaner and have to foam it in the air intake.
If that dose not help its going to be more complicated:idea: ....let me know how things go.