From your example it's not quite clear how you want to set this value and where you want to use it, but if you want to set a value with one spoken command, and retrieve it with another, something like this would work:
I want to set fruit equals [apple;banana;mango]
Set Text [FRUIT] to '{CMDSEGMENT:1}'
Which fruit would you like
Say, 'I would like a {TXT:FRUIT}'
There is a manual available detailing how the actions work, and which tokens are available; Press F1 while VoiceAttack has focus to open it.