VBA to lookup for a specific value and give result

I Have a workbook with 2 sheets " Acct. Details" and "Manual Checking"
In sheet "Manual Checking" have a column F (UTR NO.2) which contains digits.

Check the same digits in Sheet "Acct. Details" in column C (Particulars).
If string in C of Sheet "Acct. Details" contains the Digits of Column F of Sheet "Manual Checking" then in column "I" in "Manual Checking" should show SR. no. (Column D) from Acct Details.
If the digits are not exists the result should be "No Sr."

For example please refer sheet "Result Needed". Required result marked in grey colour