This is my first attempt (attempt or try?). Please find with red the points that I need your help. Probably there are much more to be corrected so please provide me with as much feedback as possible.
Good Morning,
ladies and gentlemen and welcome to tonight's debate. The topic for this debate is " " (sounds too simple for me)
"This is OK, it's not too simple. But you could also say something along the lines
Good morning ladies and gentlemen, it is a pleasure to welcome you to our (event, city, etc)." Also if the event will be hold in the morning, change "tonight" to "this morning"
For the proposition (proposition or propositional side) this morning we have first_speaker_name and second_speaker name while (while or an) for the opposition (opposition or oppositional side) this morning we have
(word morning is being repeated so many times)
This morning we'll have the pleasure to hear Mr. X from 'somewhere' and Mr. Y defending the position 'someposition' and Mr. Z on the other side, talking against ...
The speaking times this morning will be up to seven minutes. There will be a bell at the end of the first minute and a second bell at the sixth minute.
Each speaker will have up to seven minutes to explain his points, there will be two bells, one by the end of the first minute and other by the end of the sixth.
I would now call upon the first speak of the proposition (proposition or propositional side) to open this debate.
I would like to pass the word now for the first speaker Mr. X to open this debate. Mr. X, you have seven minutes.
I would now call upon the first speak of the opposition (opposition or oppositional side) to continue/proceed.
Thanks Mr. X, let's hear now the opposition. Mr. Z, please.
As the dust begins to settle it is time for the second round of this debate, thus I would like to call upon second propositional speaker (is second oppositional speaker ok?) I don't think so, what about the second speaker from the opposition?
This round ends with the second oppositional speaker so I would like to call upon the second oppositional speaker.
(Floor Debate)
Before the floor debate starts I would like to thank all of the four speakers that took part. At this point you could direct towards them: Thank you very much for your contribution Mr. X, Mr. Y for the ... and Mr. Z and Mr. W for the ... Now it is time for the floor debate to take place. You should raise your hand and wait for my confirmation before you ask something to the one of the speakers (speakers or main speakers). (This paragraph is not so formal to me).
Ending phrase( How could you name the phrase that I will have to say at the end?)
I need a few sentences to say at the end of the debate procedure (here is my try)
At this end of this procedure I would like to thank everyone that took part in this debate the speakers and the audience(floor debate people can be addresses as audience? yes) that took part in it. Our next debate(?) will be on the third of July. Thank you
I would like to thank you in advance for your help and cooperation.
Best Regards
Alex.