Lots of assuming here...
We're assuming you have AACC and CP integration configured and working.
We're assuming your access ports are up and working
We're assuming you have the variable menu_choice_cv created as a call variable of type integer and their's no scripting syntax error when you activated it.
If all of these assumptions are correct, the command below would have worked, provided user keyed in the digit 1. Or for testing purposes only, set the default value on the variable to 1 and see what happens.
OPEN VOICE SESSION
PLAY PROMPT VOICE SEGMENT message_vs
COLLECT 1 DIGITS INTO menu_choice_cv
END VOICE SESSION
IF menu_choice_cv = 1 THEN
ROUTE CALL xxxx
END IF