I made up this dialogue for practice and wanted to share it for some feedback (I've only been learning for a couple of days). I wrote it originally in jyutping because it's faster for me, but I can recognize the characters for the words I used and can type them out if I use my phone. I have put both versions here so that I can get the most effective corrections :)

Jyutping version

A: Zou2-san4 Wong4 Sin1-saang1. Nei5 hou2 ma3?

B: Zou2-san4. Ngo5 hou2 hou2, nei5 ne1?

A: Hou2 hou2. Ngo5 soeng2-jiu3 heoi3 Jing1-gwok3.

B: Nei5 soeng2-jiu3 heoi3 Jing1-gwok3 jau5-mat1-je5-si6-a3?

A: Ngo5 soeng2 maai5 Jing1-gwok3 ce1.

B: Jing1-gwok3 ce1 hou2 gwai3.

A: Nei5 jau5 mat1-je5 ce1 a3?

B: Ngo5 jau5 dou1 Jing1-gwok3 ce1!

Characters version

A: 早晨王先生。你好嗎？

B: 早晨。我好好，你呢？

A: 好好。我想要去英國。

B: 你想要去英國有乜嘢事呀？

A: 我想買英國車。

B: 英國車好貴。

A: 你有乜嘢車呀？

B: 我有都英國車！