Need Code of Read SMS and then GSM send real Time data

hello… i am working on AMR using arduino and gsm, my project work is stop on how to read sms and then according send code give meter real time unit with meter information.
can anyone help me to making this code or give code ?

You have a school assignment where you have been asked to develop a system whereby an operator sends an SMS message to an Arduino with a GSM card module. On receipt of that SMS, the Arduino then monitors a meter and returns some results to the operator who sent the SMS ? Is that about it ?

Real-time data and GSM do not belong in the same sentence.