如果字符串匹配，请在Excel表中查找列名

I have two sheets sheet1 and sheet2.There is a text in sheet1 'customer'.I want to find the column name like A from sheet2 if text 'customer' found in a cell of row 1 of sheet2.I am using Match function but it is returning only the index.Is there a way to find the column name like A? I have two sheets sheet1 and sheet2.There is a