Question for Voyagers

I need two return tickets to Cape Town. Any date between February 14th-!9 return 25-February to 6th March must be 6 weeks. I need the 11.30 flight preferably THE LARGER embraer 190 Not the 135. I need to be in Cape Town 1800hrs. Return would be 6am with an early connection arriving in NDOLA LUNCHTIME, PLEASE ADVISE.