"Before going to the interview for an event planning position, prepare to answer questions about your communication, negotiation, and organizational skills as well as your event planning experience. The interviewer will want to make sure you can meet with clients, negotiate with vendors, and coordinate all event details of every event while meeting tight deadlines."
Research, ask questions of people who had done the task before.
If asked about how to deal with a complaint like that, it's good to know that they divide their customers into three categories: students (who are often treated in a demanding, even condescending way, and are supposed to learn from their mistakes in planning their own events; if they're disorganized about their event, it's OK to be harsh with them and even cancel it all together, just as long as they learn to plan it better in the future); VCU departments (the representatives of which are to be kept happy but with minimal effort) and external, paying customers (who need to be kept delighted at all times, while at the same time being treated as cash-cows and charged for absolutely everything possible). Less
event which was attended by 3200 people