ServiceNow automation.. how to automate the search box

Hi
I have field Subject person in SN where when we add a name it shows the list of available employe of same name with ID…

The Name im adding in Subject field is from Excel and I have ID also from Excel…

image

Iøm confuse how can i compaire this ID of this Nomi from this DropDown that shows in picture which is showing the list. so that i select the correct employ.

Can someone help is this automation. thanks in advance.

@Palaniyappan can you help…