brakes wont depress

every morning when i go to press my brakes, usually while moving out my parking spot, i can feel pressure mounting and then the brakes completely fail to depress. it feels as if i have something stuck underneath the pedal. then i have to stop using my emergency brake and put my car in park. once i do this, the brakes depresses normally and are fine for the rest of the day. i've taken it to the dealership 3 times and they cant find a problem. any ideas of what this could be?????

Check the rubber lines next to the callipers and see if they are dammaged.

Does your car have an abs sensor?

I don't own one, I'm only in this forum for a question I asked for a friend.