In a system and method of session based short message service (SMS) communications, unallocated tokens that are freely assignable are stored. A first unallocated token is assigned to a first message dispatched from a first application. A reply to the first message is routed to the first application utilizing the first token assigned thereto. A second unallocated token is assigned to a second message dispatched from the first application. A reply to the second message is routed to the first application utilizing the second token assigned thereto.