Do you talk to fellow travelers?

I'm generally an introvert, but I spent half an hour sitting and chatting with a woman at our gate at the airport last night. She wasn't flying, but was putting her 13 year old son on a plane alone for the first time, was really torn up about it, and seemed like she needed someone to hold her hand (metaphorically, anyway, I didn't actually hold her hand). I also spent some time chatting with the woman sitting next to me on the actual flight.

Do you chat with fellow travelers, or stick to yourself/your family?