Hello, i have a problem "SDP"

Hello, i have a problem "SDP"

Good afternoon

how are you colleagues, sorry I am new to the world of manageengine and I have a problem with the servidesk plus product.
I commented:

In the service catalog I am creating a template that contains an additional field of applications (Example: VPN, WORD, ORACLE, ETC ...). I want to know how I can make when an applicant selects a different application has an approver for each application and sends an email to the approver. What are the steps to follow?

Someone could help me.

Thank you so much...