Alright. I guess this is it. 
I can't believe we're really moving out.- We've lived here for 3 years!
- I know. I'm sad to leave too.
- But hey, you're buying your own house!
- And you're moving to Melbourne!
- You're right, we should be happy.
- Hey, thanks for being a great flatmate for the past 3 years.
- Yeah you too.
- Was fun.
- Well, good luck with the new house.
- Yeah, thanks. Take care of yourself.
- You too.
- Give me a call if you're in town and we can grab a bite or something.
- No worries mate. Will do.
- Catch ya later.
this is it
："this is it"は"it is time"の意味。「いよいよだ」
flatmate
："flatmate"は家をシェアしている人のこと。
if you're in town
："if you're in town"は「自分が住んでいるところに来たら」ということであるが、この場合、"town"は、この女性の引っ越し先である「メルボルン」を指す。
No worries
："No worries"は"No problems"あるいは"everything is fine"の意味。「問題がない/全て大丈夫」また、許したり、元気づけたりするときにも使う。
Will do
："Will do"は"I will give you a call"の意味。「電話するよ」