Aliens: [Hello. We have come to assess your planet's lifeforms. We mean no harm.] Me: -stares- Aliens (amongst selves): is this the incorrect language? -try Mandarin, Spanish, Hindi, and Arabic- Me: -stares- Aliens (amongst selves): [Very well. Perhaps this lifeform does not possess verbal communication skills.] Me: -stares- Aliens: -try talking to cats-
If they're aliens I've seen in dreams then I'd invite them in and catch up. If I've never seen them before, I would attempt to communicate with them. Either way I'd probably end up asking ten million questions (and give as many answers) and taking tons of pictures.