sharepoint online – Enter the personal manager's email and send it as "assigned to" with the help of ms flow?

I have trouble on the SharePoint list with the ms workflow.

I created New request sp list and Requested order sp list, then Employee sp. list

Thus, the list of employees has the Manager column that includes the name, email addresses, and the Personal column that includes names, email addresses. Each item in the list contains information about the numbers in a column and the name and e-mail address of their manager in another column of the same item.

I use ms feed approval where "assigned to" – I need a business logic that "assigned to" should be sent to the respective manager's email address .

for example: as shown in the screen capture.
director and staff

Business logic should be like If the logged in user is a staff member, he must choose his manager and send an email for approval.

Thank you