It's polite to say hello.
Cindy's family is hosting a cookout, and her son Josh has a new girlfriend, Ana, who has never met them.
Cindy wants Josh to bring Ana to the cookout.
Ana arrives and says hello, and Cindy responds with a big warm hug.
Ana arrives and says hello to Cindy, who then walks away.
Ana feels welcomed at the family cookout and is able to relax and enjoy herself.
Ana thinks that Cindy has snubbed her and feels unwelcomed.