This is a telemarketing scam. If you answer the call, there will be a brief delay, then a click then a female voice of "Hello?" And if you answer that with something like "hello" or "yes?" Back, the in turn respond with "oh! Hi! I'm sorry, I was having some trouble with my headset." And then this cleverly programmed auto dialer/recording goes on to say that she is calling because you stayed at one of their resorts awhile back and because of that they would like to offer a great deal to you.