I notified my manager 3 months ahead of time for a small vacation I have planned that I would need 3 days off for. They explained someone else has the whole week off and that they do not approve two people off at the same time, but will discuss this tomorrow. Any advice on what to do? I’m not canceling my measly 3 day trip because they will be slightly short staffed. They can call over from other locations to get help and it’s not like there’s only 1 person working at all times.