If a friend asks you to go to a party, but you have to go to work, how to ask for leave is better. If you ask for leave, it is best to explain the situation to the foreman, so that the foreman can arrange other people to help you do your work well. Please ask the leader if you can ask for leave, so it's ok to ask for leave for normal reasons. Just tell the foreman or the leader that I have an important friend for his birthday and ask me to go to the party. Generally, if you say this, the leader will approve it. Although the dry catering is busy, you will be asked to leave if there are enough people. Personally, I think it's reasonable for a friend to ask you to go to the party. After all, everyone has friends and everything.