EMB 170 Flight Attendant reported the aircraft landed with a malfunctioning parking brake.

Narrative

This is what I remember from the incident. It was a beautiful sunny morning; although it was a little chilly the sun was out already. We had a normal boarding procedure; our everyday routine was the same. We preflighted the aircraft; then got ready to board the passengers. Our flight time was about 37 minutes with 21 passengers on board. I was cleaning up my galley area after just finishing service for first class. All of a sudden I heard a sound; [the] call button; and the red light was flashing. I noticed right away that it was the emergency call button. I walked and picked up the phone - [the other] Flight Attendant also got to the phone at the same time as me. We both answered the call; and before we could say 'nature of emergency;' the Captain told us to take a deep breath. I was super nervous at that time because I only see [the] green call button when working flights.The Captain explained to us that the parking brake was not releasing. There was no special command yet and he will let us know if we need to evacuate or not. After the phone call [the other] Flight Attendant and I started to prepare the cabin for arrival. Since our flight was short everything happened pretty quick. We double-checked to make sure everything was latched and secured properly. We made sure the passengers were buckled up; and bags were stowed away away so it's not in the way if we do have to evacuate. With the smile on our faces - nervous inside. The Captain made an announcement to the cabin and explained the situation. He assured everyone to not worry; he let us know in advance that we will see fire trucks and emergency vehicles. The flight was still smooth when we were preparing the cabin. I went to the back to talk to [the other] Flight Attendant. We both assured each other that everything will be fine; we just have to wait for Captain's update. Then we got back to our jump seat. I went into my brace position and did my silent review. At the same time I was ready for any command from our Captain. Was I nervous still? Indeed I was but I couldn't show that to the passengers - I mean some of them were sleeping. But still; as the A Flight Attendant all the faces are on me; which meant that I have to show them that there is nothing to worry about and I truly trust our Captain. I was ready for any command from the Captain; just tell me when. As we descended I made note of my [mental checklist]. At last we landed smoothly in ZZZ. As we made our way to the gate there was already emergency vehicles ready for us.Overall; I am grateful that we landed safely and we did not have to evacuate. I'm also thankful that our Captain made the right decision; because we never know what could've happened. Yes; our tires didn't pop; and that's a good thing right. I believe that this moment prevented us from further emergency situations. Everyone landed safely and that's what matters the most to me. After deplaning the passengers we all went on to a new plane for our next flight.