By the time we got to our gate after check in, our flight had been delayed enough for us to miss our connecting flight. I attempted to rebook our flight via the AA app, but it wouldn’t let me choose a flight until the following day. I went to the desk to ask for help, (there was no one else at the desk that needed help and there wasn’t a flight boarding at the time) and when I explained what was going on I was very curtly told “Don’t do that! Call this number!” and she threw a postcard with a phone number on it at me. When I tried the number, it wouldn’t connect, I only got beeping on the other end. I returned to the desk, where fortunately, another employee was able to get me seats on a flight later that evening. When we landed, our original connection was also so delayed that we were able to catch it and fortunately, the employee there was super helpful in getting us seats on that flight again. However, I continued to get notifications for the evening flight that we would have taken and it too, was very delayed.