全文 The whole conversation, with pinyin and English
美玲：李老师，我可以去厕所吗？
lǐ lǎo shī wǒ kě yǐ qù cè suǒ ma
Meiling: Mr Li, may I go to the toilet?
李老师：可以。快去快回哦。
kě yǐ kuài qù kuài huí o
Mr Li, the teacher: Yes, you may. Go quickly and come straight back.
美玲：好的，谢谢老师！
hǎo de xiè xie lǎo shī
Meiling: OK, thank you, teacher!
李老师：记得洗手。
jì de xǐ shǒu
Mr Li, the teacher: Remember to wash your hands.
美玲：老师，我回来了。
lǎo shī wǒ huí lai le
Meiling: Teacher, I'm back.
李老师：你洗手了吗？
nǐ xǐ shǒu le ma
Mr Li, the teacher: Did you wash your hands?
美玲：洗了，用肥皂洗的。
xǐ le yòng féi zào xǐ de
Meiling: Yes, I washed them with soap.
李老师：真棒！快坐下吧。
zhēn bàng kuài zuò xià ba
Mr Li, the teacher: Well done! Now sit down quickly.