Visitor Visa - B2

So guys my interview was today and I got rejected
Inter. Hi I can't read your name actually
Me . It's ok just say
..
Inter. So what is the purpose of ur visit actually
.
Me .for tourism during my summer vacation
Inter. So who is this ....
Me.he is my friend's uncle actually I wrote his name because he is going to accommodate us in his Airbnb instead of my friend's house because it's small and she can let me go there
Inter.so what does ur friend do
Me. She is a pharma technician and she lives in the us
Inter.so how did you know each other
Me .from egypt when I was looking for a university we meet and we kept talking online
Inter.what does your father and mother works
Me .my father is a construction engineer and my mother is a housewife
Inter. And how old is ur friend
Me .she is 27
Inter. You..
Me.22 but I will be 23 in July
Inter.have you been to any other countries
Me.i have been to saudi 3 times and I go to egypt once or twice a year to meet my family before returning back to ukraine
Inter.so what do you do in Ukraine
Me.i am a full time student in medical university fourth year and I am expected to graduate in 2022
And two more years of residency
Inter.so when did u come to Ukraine
Me .2015 I started with a Russian school for one year then I entered medical school
He kept typing and typing
Inter.do you want to work in Ukraine afterwards
Me
Yes I would like to I really like kiev so much
Inter.yes !
So I said
Me.i have my transcript and my result from krok which is ukraine license exam and a certificate from my university saying that I am their student
Inter. AHA
then kept writing and writing
Then
Sorry we can not accept your visa
 So guys I am really so sad and depressed I was putting so much expectations for this and i really wants to do another interview so any advices or u see any false
S