text: Aston: I can't believe our trip to Japan is in 3 months already, feels like I booked it just yesterday
  Mona: True!
  Mona: I'm really excited about it too, can't wait to go back there <3
  Aston: If only it wasn't so far away we could go there more often but it can't be helped
  Mona: Ah, speaking of which!
  Mona: How much do I owe you for the plane tickets?
  Mona: You should've reminded me, I keep forgetting and time flies by without me even noticing
  Aston: I told you you could pay me back whenever, it's not a big deal
  Aston: It was 600 euros
  Mona: Hmm, do you want that in cash? Or should I send you a transfer?
  Aston: Whichever is fine!
  Mona: Then I'd rather transfer. Can you give me the details?
target: Aston and Mona are going to Japan in 3 months.  Mona owes Aston 600 euros for the tickets. She will transfer the amount.