求翻译：30人以下的团队需提前3小时与餐厅联系焕餐。30人以上的团队需要提前24小时与餐厅联系换餐。但在接近用餐时间旅游者要求换餐时，导游人员不应该接受。但旅游者坚持换餐或加餐时，导游人员旅游满足旅游者，但必须告知，费用由旅游者自己承担是什么意思？

Team of 30 people required 3 hours in advance contact hwan and restaurant meals. Team of 30 or more required 24 hours in advance contact the restaurant for dinner. But at close to dinner time tourists ' requirements for meal time, tour guides should not be accepted. Tourists insisted on changing mea