Dynamic Excel Columns

I am pulling excel file in ms sql table which has 2 fields as of now but in future client might add 3 more fields at the end i.e

Current Excel file fields

Sr.No Account1

In future after adding fields the excel file will look like

Sr.No Account 1 Account2 Account3 Account 4

Client is not willing to add those field as of now and send me blank values for those 3 fields...

I want to create a dynamic package which will take aforesaid 3 fields into account as of now so if client addeds them later then too i don't have to change my package.

I know it can be done in script task but is there any alternative way to do the same...

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