Mostly just one for every app on my phone that is just wasting space. However here are the first few ideas that come to mind. Because it is a chatbot for most of these things you can offer an app for just the local business, it doesn't matter if I have to use different chatbot in a different city.

- Pay parking (payment, expiry notification)

- event tickets (purchase, rsvp, ticket image)

- catching pokemon (just catch whatever and message me a snazzy report full of pokemon names every once in a while)

- ordering food

- managing bills (let me know when phone/electrical/heat bill comes in, check usage so far, coordinate payment between all the people in the conversation)