Iot in agriculture

I am working on smart agriculture
I am using gsm800 shield
I am done with connection moisture sensors with Arduino UNO and gsm shield
And I am successfully able to make a call to user with Gam shield if moisture is low.
Can anyone help me now how can I implement IVRS in it and ask user like to press 1 to start motor , etc.

IVRS = Interactive Voice Response System

Arduino is not what you are loking for in this respect, sorry. But you could make it react to whisteling, if that's enough.