Try these two versions of show and then reset.
You can only reset a user which has a device, if there is no device, then there is no reset. So show user, then reset.
email address works well.
tell traveler show email@dbryant.de
tell traveler reset * email@dbryant.de
notes names work too
tell traveler show Douglas Bryant/My/World/DE
tell traveler reset * Douglas Bryant/My/World/DE
Sincerely
Douglas Bryant
email@dbryant.de
www.dbryant.de