i don't see a problem with this. like sure it isn't of utmost importance or anything but it's better than just calling and not having any clue whether it's something important, if it's no longer relevant (ie, if someone is calling me for a ride or something i don't expect a voicemail since by the time i get to it they probably don't need a ride anymore), or whatever. it lets me know "they just wanna talk, it isn't important, i'll give them a call in a bit when i have some spare time"
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You saved science, SuperNiceDog!
Congratulations to the Kentucky Wildcats, NCAA basketball champions!