use warnings;
use strict;
use feature 'say';

my @strings = (
    "Bob said hello\n",
    "Alice doesn't like Chris\n",
    "This line won't match\n"
);

for (@strings){
    say "yay!" if /(?:\bAlice\b|\bBob\b|\bChris\b)/;
}

##</code><code>##

/
  (?:         # group, but don't capture
    \bAlice\b # capture Alice, if it is standalone
    |         # or
    \bBob\b   # same as Alice above
    |         # or
    \bChris\b # same as Alice and Bob
  )           # end grouping
/