The next leg begins early

Leaving the hotel at 3:45 started this leg of the trip. No shuttle so we had to get a cab at the last minute. Not a big deal, it’s only a 3-minute ride from the hotel.
Next check in: I’m sorry we can’t find your reservation. You will need to talk to the agent. They start at 4.
While standing in line we met a nice lady with a German shepherd puppy going to Argentina.
Then a short wait for TSA to open, another wait for the coffee stand to open and then we are finally at the gate at 5.