Here's the completed dialogue:
- S1: It's time to choose the route for our journey. This year I'd like to travel far and wide.
- S2: How can we get there?
- S1: I'd like to go to a desert in Africa.
- S2: I don't think it's 'mind where it's very hot in the daytime and very cold at night there! No, not a desert. Isn't it boring?! Sand, sand, sand...
Note: The provided image has handwritten answers that are difficult to decipher perfectly, so the completion is based on the likely intended meaning and context.