Đọc dữ liệu từ response

@pytest.fixture
def mot_booking_id_co_that(api_context):
    """Lay 1 bookingid dang ton tai that trong he thong.
 
    KHONG duoc doan dai mot id co dinh (vd id=1) vi du lieu Restful-Booker
    tu dong reset dinh ky, danh sach id con lai thay doi lien tuc.
    """
    response = api_context.get("/booking")
    danh_sach = response.json()
    return danh_sach[0]["bookingid"]

def test_lay_chi_tiet_1_booking_dung_cau_truc(api_context, mot_booking_id_co_that):
    """GET /booking/{id} voi id co that phai tra ve du cac field theo dung 'hop dong' cua API."""
    response = api_context.get(f"/booking/{mot_booking_id_co_that}")
    expect(response).to_be_ok()
 
    body = response.json()
    assert "firstname" in body  # co du field firstname
    assert "lastname" in body  # co du field lastname
    assert "totalprice" in body  # co du field totalprice
    assert "bookingdates" in body  # co du field bookingdates
    assert isinstance(body["totalprice"], (int, float))  # totalprice dung kieu so, khong phai chuoi