Antifreeze leakage

Hi there, I had put in antifreeze in my car, it drove fine all day of Saturday. Sunday afternoon when returning close to home from dropping off a person to work (in little over an hour of time duration) I began to see smoke come out from the passenger side. As I tried to continue with my day, the smoke had become more noticeable. My thermometer kept going up forcing me to pull over and shutting off the car until it cooled down. I was glad to make it back home safe for the day. On Monday morning, I had my car towed to the mechanic. After my mechanic had told me the problem, he had told me that air got trap within a hose that connects to antifreeze. (Everything seemed better). The next I drove it (forty five minutes) locally and I had to return to the mechanic again to drop off a payment. As soon as I was waiting to enter to garages, it started overheat/smoke again. I had let my mechanic take a at it and left it once again. After it was done the next day, he had then told me the hose got loose and clutched it down and secure it. I had asked a family member to drive it to wherever and see if the same problem occurs (a little under two hour duration of driving and running errands) a small amount of smoke reappears according to family member) although the thermometer gauge seemed normal. That same night he had placed cardboard boxes under the car to see if there was still leaking. So far there if two spots and a small spot of oil.