Dialog gabungan dari expresiing request,suggestion and instruction

A : hey, may i borrow your ruler, i forgot to bring it to school
B : Sure, but you should not forget your things, i think you should prepare your stuff at night so you won't forget to bring them to school
A : Yeah thanks for your suggestion i will do that next time, and can you tell me how to use this ruler?
B : You just have to put it on the paper, place the zero end of your rule at the end of your object, then you will know how long it is by looking at the number on the ruler.
A : Oh cool,thanks
B : You're welcome