anchoring format ; How to call speakers to the dias/podium

May I call upon Mr. X. Mr. X please

I would like to request Mr. X to deliver/give his/her

speech/remark. Mr. X please.

Thanks Mr. X for your valuable/informative

speech,presentation.

In Talk show, one speaker should be stopped after 3 minutes

if there are more than one speaker.The other speakers may

interrupt the other one in speaking if the format allows it