Robocall, do not answer!

Some sort of cruise line, when you call back it's automated.

They start by asking if you can hear them alright.  I think it's part of the scam where they record you saying yes and splice it together with other questions so it sounds like you're verbally agreeing to stuff

Someone called my number, and it was quite at the other end. Then after about one minute I hear a lady's voice saying can you hear me? But I just did. Not say a word, and the she cut the line off.