Hi Kristen,
You can create a campaign that triggers on a "data value changes" trigger.
1.) in the smart list, choose "data value changes" with the lightning bolt next to it, next
2.) put the field you're keying off of as the "attribute" and then,
3.) create a "constraint" with new value equals "yes..", or TRUE, or 1, or however the data is captured that indicates that they would like to be contacted.
Then, in the flow have it send you an alert.
Best Regards,
Dave