change the sheet name while exporting sql data to excel

i have designed a rdl form which contains 3 tables .. i gave page break for each table. when exporting the file to excel it generates 3 sheets .. three sheets name comes like sheet 1, sheet2 ,sheet3.. i dont want it to be like these.. instead of that i have to give my own name while generating reports from rdl form like this (s1,s2,s3)...

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Jarret