I am writing this letter for you to inform that I could not in Montevideo in 17

1. 
   Hello Josie
   

I am writing this letter for you to inform that I could not in Montevideo in 17^th November. Because I have some problems with getting tickets to airplane. I could not get it early and so there is not available tickets for that day. I am so sorry about upcoming plans in this day and I need to adjust my plans also. Therefore, I will go there on 20^th November. When I reach there I will call and inform to you.

And please, if you have free time on 17^th November, can you meet Gabi at the airport?!

Have a nice week.

Your sincerely, John.

2. 
   Hello Raquel
   

How is everything going on? I am writing this letter to inform you that I could not work in this weekend of 1 and 2 december. I am so sorry about that but I have some issues about my studies. Because, I have an upcoming exams in these days. It is the very important pass the exam becasuse it go with getting diplomas. I am sorry, but if you want I may work in Monday and Tuesday of the next week to cover these days. Please, tell me if you agree with me.

Have a nice day

Best wishes, John