以下是幾個比較經典的失約語句：
1. "Sorry, I forgot."
2. "I'm sorry, I got held up with something else."
3. "I apologize, something came up unexpectedly."
4. "I'm sorry, I got stuck in traffic."
5. "I'm sorry, I had a family emergency to attend to."
6. "I'm sorry, I had a scheduling conflict."
7. "I'm sorry, I double-booked myself."
以下是幾個比較經典的失約語句：
1. "Sorry, I forgot."
2. "I'm sorry, I got held up with something else."
3. "I apologize, something came up unexpectedly."
4. "I'm sorry, I got stuck in traffic."
5. "I'm sorry, I had a family emergency to attend to."
6. "I'm sorry, I had a scheduling conflict."
7. "I'm sorry, I double-booked myself."