请有经验人士告知如何获得玻利维亚酒店预订单

我常去南美，想去玻利维亚旅行，在玻利维亚驻中国大使馆网站上看到申请签证需要如下文件：

4.A Hotel Reservation Receipts or Notarized Invitation Letter from Bolivia


预订宾馆的依据单或经玻利维亚政府公证的邀请信


符合规定的宾馆预订依据，该依据须写明所有预订信息，入住及离开酒店的时间应与在玻停留时间相符。或出示经玻政府公证的正式邀请信，信中应写明为受邀人提供的住宿地址，并承诺承担受邀人在玻期间的各项费用。邀请人须到玻利维亚移民局外事处（或签证处）面访，说明邀请情况。


A legal hotel reservation receipts with all the reserve details. The time of check-in and check-out should be in accord with the stay span in Bolivia; or a notarized formal invitation including the invitee’s lodging address and a statement of affording all the expenses for the invitee during the stay in Bolivia. The inviter should go to the Immigration Office of Bolivia to take an interview for stating the invitation details

如何获得玻利维亚酒店预订单？请有这方面经验的人士告知。