As per the discussion with John, we have revised the memo and added the information about the machinery and list of contractors for the hotel construction in Bangkok. Note: Machinery is uncountable and has no plural form.

For corrections, I think it'd be better if you used the notebook session of this site, but since you've already posted it here, then I made a few improvements to your sentence, I hope it helps. As was discussed with John, we have revised the memo and added the information about machineries and a list of contractors for the construction of the Hotel in Bangkok.