Elijah: How is it going? Where are you now?
Seth: We're going to some islands now
Elijah: but where?
Carlos: In Thailand 
Elijah: what, I thought you were still in Laos
Seth: We flew from Vientiane to Bangkok today
Seth: and now we're heading southwards 
Elijah: I envy you so much. It's very dark and rainy here 
Seth and Carlos flew from Vientiane, Laos to Bangkok, Thailand today and are travelling south. Elijah is jealous because of the bad weather here.