Send Email Based on the Content Keyword

hello, i already made an exercise regarding to email. My next step is from that email in the excel (xml), then based on keyword in the content of email (body), then we can send to a person who that are assign assign in that job

pls give me a workflow in order as a reference if i have a wrong step. Thank you in advance!

Kindly elaborate a bit more on this process so that we could go in a right direction to solve this
Like from where we need to validate and where we to check and send mail

Cheers @f39b242a4f84ba555bd3