[<reference> exchange token]-> [<input> menu option] [menu option]-> [<choice> 1.Check exchange rate] [1.Check exchange rate]-> yes [Fetch user exchange rate *(celery tasks)] [Fetch user exchange rate *(celery tasks)]-> [<reference> complete] [1.Check exchange rate]-> no [<choice> 2. Exchange] [2. Exchange]-> yes [<reference> exchange token agent number entry] [2. Exchange]-> no [<reference> exit invalid menu option]