2000 TOYOTA ECHO User Comment / Complaint

I was driving from florida after a vacation. after approximately 2-3 hours of driving on the highway i noticed that there was a decrease of airflow and coolness from my a/c unit. i shut it off and turned it back on and tried different level of air flow and cooling and no change. i stopped at a gas station and found there to be condensation on a tube under my hood. after stopping for about 10 minutes and then driving without the a/c for 20 minutes i turned the a/c back on and everything was back to normal.