sentence: We would like to say thank you for your presence at the event . We are delighted because you chose to promote our educational program . We are pretty sure that your presence helped a lot to promote this program with the new students .
modified: We would like to say thank you for your presence in the event , we are delighted because you chose to promote our educational program , we are pretty sure that your presence helped a lot to promote this program with the new students .
transformation: PREP, PUNCT, PUNCT