Alice just met Lee in the cafeteria.

Alice1: あれ？　ロバートくん？
Robert1: こんにちは！ アリスさん！
Alice2: ここ、いいですか。
Robert2: どうぞ、どうぞ。
Alice3: 今日(きょう)、日本語のクラスに来(き)ませんでしたね。朝ねぼうですか。
Robert nods and yawns.
Robert3: ごめん。ねむいんです。
Alice4: ゆうべは何時にねましたか。
Robert4: ええと…２時にねました。
Alice5: いそがしいんですね？
Robert5: ええ、きのうのばんからでまえロボットがクラブに帰(かえ)らないんです。
Alice6: え、どうして？
Robert6: わかりません。

Translation

Alice1: Huh? Robert?
Robert1: Hi, Alice!
Alice2: May I sit here? (Lit. "Is this place okay?")
Robert2: Sure, sure.
Alice3: You didn't come to Japanese class today. Did you oversleep?
Robert nods and yawns.
Robert3: Sorry. I'm sleepy.
Alice4: What time did you go to bed last night?
Robert4: Let me see..., I went to bed at 2.
Alice5: You are busy, aren't you?
Robert5: Yea, since last night, the delivery robot hasn't returned to the club.
Alice6: Oh, why not?
Robert6: I don't know.

Cultural Notes

1.

あさねぼうする

The verb 朝寝坊 (あさね ぼう)する ("to oversleep in the morning") comes from the noun 寝坊(ね ぼう), which literally means "sleeping late." The second part, 坊(ぼう) , originally referred to a Buddhist monk or young boy. In older Japanese, …坊 was also used to describe a person with a particular habit or characteristic. For example, 食(く)いしん坊(ぼう) refers to someone who loves eating or is a big eater. Similarly, 寝坊 originally referred to someone who habitually slept late. Over time, the word came to mean the act of oversleeping itself, and the verb 朝寝坊する developed from it.
2.

Switching to plain-form conversation

As Alice and Robert become better acquainted, their speech gradually becomes more informal. Exactly when this shift occurs varies from person to person and is difficult to predict. One sign that the relationship is becoming closer is that Robert and Alice momentarily switch to plain forms (Robert3: ごめん, Alice6: どうして？). As their friendship develops, both speakers are likely to use plain forms more frequently, although some Japanese speakers continue using polite forms even with close friends. The choice depends on the relationship, the situation, and the personalities of the speakers.