ada yang bisa menambahkan percakapan tersebut agar lebih panjang?

Answer:

In writing a dialogue, there are several things you need to keep in mind, especially to make it longer or more creative, they are
- the theme
- the setting of the dialogue
- target language
- register (formal or informal sentence)

Here's the example of how to make the dialogue above longer
Lina: So, when are you going to visit my house? 
Siti: Hopefully, this weekend, are you free? 
Lina: Oh, unfortunately my family have this annual extended family gathering in my uncle's house. So, probably not a good idea for this weekend. 
Siti: So, next weekend then, will that suit your agenda?
Lina: Sure, what time? 
Siti: I'll let you know in advance, OK, like on Friday to confirm. How's that sound? 
Lina: That'll do. OK, I gotta go now. See you around.
Siti: See ya. 

Kelas: SMP
Pelajaran: English
Kategori: dialogue