Task: Question Answering
Input (English): I called AAA and then my step - father and it just turned into a giant fiasco . My brother had to come pick me up and the car has to stay there overnight ( because the garage was closed for the day ) , so that means we have to get up early , so we can drive there and unlock the gate and see the car get towed away . Then , because the garage only does oil changes on Saturday and they're closed on Sunday , the car will have to sit there until Monday , which means I don't have a car for the rest of the weekend . 
Question: What may have caused the car to sit there until Monday ?
Output (English): The mechanic wasn't available until then .