Why do these messages get generated?


I got this text about 45 min ago. I've gotten this message a few times in the past but don't see the point.
---- msg below---
We're sorry, it's been too long and you can no longer message your driver. Please try calling the driver (if available) or visit help.uber.com
---end of msg---

Why would I get this? Nothing was left in my vehicle by any pax and I promise nobody's after me for my looks or money :-)