Japanese/ Natural speed please. Note: A friend pointed out unnatural Japanese in these dialogues. However it is my only reference, please bare with me. Thank you so much!
1. What is that? (Lit. As for that thing, what is it?)
それはなんですか。
2. Which one is it? // Which one do you mean?
どれですか。
3. It's that one. // I mean that one. <pointing>
それです。
4. Oh, that's a pen.
ああ、それはぺんです。
5. Isn't it a pencil?
えんぴつじゃありません。
6. No (i.e. that's right). It's a new pen.
ええ。新しいぺんですよ。
7. Oh, is that so? // Oh, really? // Oh?
ああ、そですか。
8. Is that (over there) a dictionary?
あれは地引ですか。
9. Yes, that's right.
ええ、そです。
10. Isn't it small!
ちいさいですね。
11. It is, isn't it!
そですね。
12. Is it a good dictionary?
いい地引ですか。
13. No, it isn't (good)!
いいえ、よくありませんよ。
14. Oh, really?
ああ、そですか。
15. Is this an interesting book? <looking for something to read>
これはおもしろい本ですか。
16. No, it isn't (interesting).
いいえ、おもしろくありません。
17. Well then, [how about] that?
じゃ、それは。
18. Do you mean the magazine?
雑誌ですか。
19. That's [very] good!
それはいいですよ。
20. Here!
どうぞ。
21. Is that a magazine? <looking at some Japanese paperbacks>
それは雑誌ですか。
22. No,it isn't.
いいえ、そじゃありません。
23. It's a book.
本ですよ。
24. How about this one?
これは。
25. Oh, that's different.
ああ、それはちがいます。
26. That's a magazine.
それは雑誌です。
27. That's not a [very] good newspaper, you know.
<to Smith, who is about to buy a newspaper>
それはいい至文じゃありませんよ。
28. Oh?
そですか。
29. How is this one?
これはどですか。
30. It's the same.
おなじです。
31. It's no good!
だめですよ。
I was typing really fast, sorry if there are spelling errors :(