Methods for user-interface over SMS messages based on a rolling sequence model

A machine-implemented method for providing a user-interface over a Short Message Service (SMS) to enable functionality in an interactive system, the method comprising:

• receiving a first SMS message from a user to initiate a user session;
• assigning a first phone number from a sequence of phone numbers to the user session;
• transmitting a second SMS message from the first phone number to the user in response to the first SMS message, wherein the second SMS message includes a set of options corresponding to a level within the interactive system;
• receiving a third SMS message from the user, wherein the third SMS message includes a selected option from the second SMS message;
• assigning a next phone number from the sequence of phone numbers for responding to the third SMS message;
• transmitting a fourth SMS message from the next phone number to the user in response to the third SMS message;
• assigning a last phone number from the sequence of phone numbers to the user session;
• receiving an incoming SMS message over the last phone number;
• and
• assigning the first phone number from the sequence of phone numbers to the user session in response to the incoming SMS message.