batch programming add partial file name to column in csv

[mchu]

Hope someone would help me on batch programming please!

File name: Customer_call_list.csv
How to add partial file name: "call"  to a new column up to EOF?

Here is the content of Customer_call_list.csv (in excel comma delimited)

Customer         Date
A                      1/1/14
B                      1/8/14
C                      1/18/14
D                      1/28/14


Thank you very much!