Answer :
brother: hello! sister. how are you???
sister: oh brother what to say I am not good. you must be enjoying there because there is energy
brother: oh maybe many of the people are wasting energy
sister: yes they are not making the use of energy nicely
sister: everytime the people switch on the lights even there is no use of
brother: you should go with your friends and tell everyone
sister: I think its a nice idea