I have booked an apartment for us to stay in for one week, when I come. Let me know that you will definitely be there December 27th - January 3rd. It is important

to book: ayırmak/yer ayırtmak/rezervasyon yaptırmak

apartment : apartman dairesi

I think this is better;

Geldiğimde, bize bir hafta için bir apartman dairesi rezervasyonu yaptırmıştım. 27 Aralık - 3 Ocak´ta kesin orada olacağını bana haber ver. Çok önemli.

I guess you mean "I wasn´t able to come"

I think you should ask him about the details. But I don´t think that there would be any problem for anything for the hotels in İzmir.

One -i for noun clause; komedi filmler-i

Other -i for "known object" of the sentence: komedi filmleri-i

But we cannot put double i together, so we need a "buffer". The suitable buffer letter is "n" for here. So the result is: komedi filmler+i+ni = komedi filmlerini

As it is symbolized, love consists of "<" and "3". Yes; love is less than 3, which means love is either for 2 people or one.

"You went. You took something from me while you were going. That affected me very bad. You took my smile too (since you went, now I cannot smile- that is some kind of word art?)  I wish you left my smile. Because it was from my mother (it was with me since I was born)"

I hope that is clearer now

What you brought affected me much (affected badly). At least you should have left my smile, it was a souvenir from mom.

About "Evin suyu mu çıktı?";

"suyu çıkmak" is a phrase to criticize the offer by the usefulness of an object. "evin suyu mu çıktı?" means some like "The house is still a good place; we don´t need to go somewhere to pass our vacations"

Another example some like a person who wants to go to a course but his friend criticizes the course about another course;

Ahmet:   Trompet kursuna katılmak istiyorum  (I want to join the trumpet course)

Mehmet: Neden? Zaten gitar kursuna gidiyorsun, gitarın suyu mu çıktı? (Why? You already go to guitar course, what happened to guitar?)

"classroom" as lesson? if yes; 1. Bugün derslerin nasıl?

2. Bugün sınavın var mı?

3. Nezle mi oldun? (Soğuk mu aldın? or Üşüttün mü?)

4. Neden beni görmezden geldiğini bilmiyorum. İstersen bana her şeyi anlatabilirsin.

5. Seni önemsediğimi unutma

6. I guess you wanted to ask "Did you have dinner?" : Akşam yemeği yedin mi? 

"şerefine" may be like "in honor of";

"In honor of the world which ...."