I like the sounds of this! Low priority calls make the high priority ones that much more fun.
Some callout suggestions:
Noise Complaint - Person shooting fireworks, or having a party (which you have to disperse)
Disturbance - People loitering in area, shouting or just standing (disperse them)
Drug Complaint - people smoking weed under a bridge/on street
Offender Compliance Check - visit the home of a parolee/person out on bail to ensure they are complying with their conditions.
Neighbor Dispute - Neighbors arguing (break it up)
Mischief - Person/people causing damage to property (breaking fences, denting cars, etc)
Alarms - Residential / Commercial automatic entry alarms (most likely false, but possible to find B&E)
Emotionally Disturbed Person - Person acting odd (ranges from shouting nonsense to being suicidal)
Backup Officer: Sovereign Citizen - Person refusing to show identification on traffic stop / other call (arrest or talk him into showing ID)
Criminal Harassment - Victim has been receiving harassing phone calls/messages from a person (go talk to the suspect and deal with it accordingly).
Trespassing - Person walking on private property (find out why they are there and remove them).
Taxi Dispute - Cabbie and customer in argument about fare / person refusing to pay (determine who's correct and deal with it)
Assist Security Agency - Security has a person in custody (help them investigate and lay a charge if necessary)
Person Refusing to Leave - Manager of store wants police to help remove an unruly customer.
Missing Person - Person is missing (have description of person, talk to people in area to locate)
Traffic Hazard - There is debris on the road that is dangerous to motorists (remove from roadway or direct traffic until the city can remove the hazard.
Protest - There is a group gathered protesting (make sure it remains peaceful and traffic continues to flow).
Stolen Bicycle - A person has woken up to find his bike missing (gather info and see if you can locate it).
Welfare Check - Family member concerned for well being of relative (go to address and see if they're okay).
Suspicious Occurrence - Caller says there is a person in a car/on foot that has been watching a residence / circling the block for a while (locate and identify their intentions).
Hope this gives you some ideas! Good luck on coding - I cant wait to see the finished product