I have agreed to look after a friend's dog for a few days, he's being dropped off today and when I asked what time, my friend said "lunchtime".
This is way too general! This could be anywhere between 12-3pm, right?
Would I be rude if I asked BUT WHAT TIME?
I always need very specific information to feel comfortable. Otherwise I'll just do absolutely nothing except anticipate their arrival from 12 onwards.