The incident happened inside the singer-songwriter's private jet which was flying from New York to Washington DC earlier this week, reported Ace Showbiz.
Based on Streisand's representative's story, the attendant approached the dog after noticing its presence. She reportedly wanted to pet the dog without offering it her hand first.
The gesture was said to be the common strategy used when ones wanted to get acquainted with unfamiliar animals. Samantha bit the woman as the dog felt threatened and considered the woman a stranger.
It was also said that the 73-year-old singer was terrified and embarrassed.