A note about the translation: I've used a somewhat literal translation, so that the English is closer to the logic of the original Mandarin.
M：小李，你吃飯了嗎？
M: Xiǎo lǐ, nǐ chīfànle ma?
M: Xiaoli, have you eaten?
L：還沒，你呢？
L: Hái méi, nǐ ne?
L: Not yet, and you?
M: 我也還沒。你餓了嗎？
M: Wǒ yě hái méi. Nǐ èle ma?
M: I also haven't yet. Are you hungry?
L：好餓！
L: Hǎo è!
L: So hungry!
M： 我也是，我也很餓
M: Wǒ yěshì, wǒ yě hěn è
M: Me too, I'm also really hungry.
L：你想吃什麼？
L: Nǐ xiǎng chī shénme?
L: You want to eat what?
M：我想吃飯！你呢？
M: Wǒ xiǎng chīfàn! Nǐ ne?
M: I want to eat rice (a full meal)! And you?
L：好啊，我也想吃飯
L: Hǎo a, wǒ yě xiǎng chīfàn
L: Ok, I also want to eat rice.
M：那我們去吃飯吧！
M: Nà wǒmen qù chīfàn ba!
M: Then let's go eat!
L：好，去餐廳吃怎麼樣？
L: Hǎo, qù cāntīng chī zěnme yàng?
L: Ok, go to a restaurant to eat, how about it?
M：好！你要開車嗎？
M: Hǎo! Nǐ yào kāichē ma?
M: Ok! Are you going to drive?
L：我開車？不是你要開的嗎？
L: Wǒ kāichē? Bùshì nǐ yào kāi de ma?
L: Me, drive? Aren't you going to drive?
M：我沒有車啊，我把車子賣掉了
M: Wǒ méiyǒu chē a, wǒ bǎ chēzi mài diàole
M: I don't have a car! I sold my car.
L：你把車子賣掉了幹嘛？
L: Nǐ bǎ chēzi mài diàole gàn ma?
L: You sold the car, WTF?
M：我沒錢啊
M: Wǒ méi qián a
M: I don't have money.
L：可是我不會開車啊
L: Kěshì wǒ bù huì kāichē a
L: But I can't drive!
M：你不會開車？我以為你會
M: Nǐ bù huì kāichē? Wǒ yǐwéi nǐ huì
M: You can't drive? I thought you could.
L：我不會啊！你是不是忘記了！
L: Wǒ bù huì a! Nǐ shì bùshì wàngjìle!
L: I can't! You forgot, didn't you?
M：那怎麼辦？
M: Nà zěnme bàn?
M: Then what are we gonna do?
L: 沒辦法!
L: Méi bànfǎ!
L: Nothing to do!
A note about pronunciation: The dialogue above includes the pinyin romanization of the text. The advantage of pinyin for English speakers is that it uses the familiar symbols of the Latin alphabet. The disadvantage is that English speakers are easily deceived into thinking these familiar symbols represent the same sounds they do in English. They don't. That said, pinyin can be a useful system to learn, but you must rely on your ears first, eyes second.
Don't expect to be able to pronounce anything just by reading the pinyin; the romanization is just a reference to jog your memory. The language exists primarily in its sounds, which is why daily listening and imitation practice is so important.