diff --git a/turbo_alignment/dataset/chat/chat.py b/turbo_alignment/dataset/chat/chat.py
index 5c5e09a..dd19c1b 100755
--- a/turbo_alignment/dataset/chat/chat.py
+++ b/turbo_alignment/dataset/chat/chat.py
@@ -3,12 +3,12 @@
 from itertools import accumulate
 from pathlib import Path
 from typing import Any, overload
-from typing_extensions import Self
 
 import numpy as np
 import numpy.typing as npt
 import torch
 from transformers import PreTrainedTokenizerBase
+from typing_extensions import Self
 
 from turbo_alignment.common.data.io import read_jsonl
 from turbo_alignment.common.logging import get_project_logger
@@ -375,8 +375,7 @@ def get_slice(self, start: int, end: int) -> Self:
         new_instance.records = self.records[start:end]
 
         new_instance.original_records_map = {
-            record['id']: self.get_original_record_by_id(record['id'])
-            for record in new_instance.records
+            record['id']: self.get_original_record_by_id(record['id']) for record in new_instance.records
         }
 
         return new_instance