我不擅长挽留你还要走
[wŏ bù shàn zhăng wăn liú nĭ hái yào zŏu]
Meaning I'm not good at detaining anyone and yet you're leaving, it expresses someone's acceptance of another person's decision, even though they wish they would have stayed. The owner doesn't want to beg or make a fuss over their separation, so it shows a rather dignified and calm approach towards saying goodbye.