Dnt be too technicalGood question, I also thought about it. In my opinion, it's definitely semi formal.
I don't think you can write like to a friend.
At the end I wrote: looking forward to hearing from to, best regards, and indicated only my name(without surname). I suppose it's correct because colleague is a person you know but it's not your friend.
Just answer whatever they asked
Sorry for that but u will lose marks in tr
There is a little difference between a semi and a formal letter
But these is a lot of difference between a informal and other two
Use common sense mate , u can’t say anything about ur life in a semi or formal
Could you ?