[<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]