I'm a seasonal driver's helper who has been on the job for a couple of weeks. I have a regular driver. Recently some family obligations came up and I won't be able to work on Christmas Eve. What is the best way to handle this? If I tell UPS now, will they be likely to get another helper for my driver for that day, or at least lighten his load? I don't want to be a jerk and just not show up on Christmas Eve, but I also don't want my driver to be mad at me for the rest of my time if I tell him now. How and when should I approach the subject? Also, if I tell them I can't work after the 23rd, am I screwing up any possibility of coming back in the future? Currently it's not in the plans, but it's always nice to have options. Thanks.