How can I Select from field table into a field internal table?

what I know :

select matnr into corresponding fields of gi_material from mara.

gi_material has field matnr, field from internal table must be same with field from mara.

what I want :

select BEZEI from TVKBT into gi_sales_office(VKBUR_TXT).

TVKBT :

Field          Data element

BEZEI          BEZEI20

gi_sales_office structure :

Component          Component Type

VKBUR_TXT          BEZEI20

Is this possible to do? and how to do it?

select from field table and store into field internal table which is different name each of field.