Create a report Z_CHART and paste below code into it:

REPORT  z_chart.

* declare the context

DATA gt_context  TYPE ty_flights .

* fill the context

PERFORM fill_context .

* call the form

CALL FUNCTION 'ZXLWB_CALLFORM'

  EXPORTING

    iv_formname        = 'CHART'

    iv_context_ref     = gt_context

  EXCEPTIONS

    process_terminated = 1

    OTHERS             = 2.

IF sy-subrc NE 0 .

  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

        WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4 .

ENDIF .

*&---------------------------------------------------------------------*

*&      Form  fill_context

*&---------------------------------------------------------------------*

FORM fill_context .

  SELECT  fldate      AS fldate

     SUM( seatsmax )  AS seatsmax

     SUM( seatsocc )  AS seatsocc

    INTO CORRESPONDING FIELDS OF TABLE gt_context

    FROM sflight UP TO 10 ROWS

   GROUP BY fldate

   ORDER BY fldate .

ENDFORM .                    "fill_context

Result of the printing program execution: