diff --git a/pageindex/page_index.py b/pageindex/page_index.py
index 9004309fb..6b32a1178 100644
--- a/pageindex/page_index.py
+++ b/pageindex/page_index.py
@@ -31,7 +31,7 @@ async def check_title_appearance(item, page_list, start_index=1, model=None):
     Reply format:
     {{
         
-        "thinking": <why do you think the section appears or starts in the page_text>
+        "thinking": <why do you think the section appears or starts in the page_text>,
         "answer": "yes or no" (yes if the section appears or starts in the page_text, no otherwise)
     }}
     Directly return the final JSON structure. Do not output anything else."""
@@ -59,7 +59,7 @@ async def check_title_appearance_in_start(title, page_text, model=None, logger=N
     
     reply format:
     {{
-        "thinking": <why do you think the section appears or starts in the page_text>
+        "thinking": <why do you think the section appears or starts in the page_text>,
         "start_begin": "yes or no" (yes if the section starts in the beginning of the page_text, no otherwise)
     }}
     Directly return the final JSON structure. Do not output anything else."""
@@ -109,7 +109,7 @@ def toc_detector_single_page(content, model=None):
 
     return the following JSON format:
     {{
-        "thinking": <why do you think there is a table of content in the given text>
+        "thinking": <why do you think there is a table of content in the given text>,
         "toc_detected": "<yes or no>",
     }}
 
@@ -129,7 +129,7 @@ def check_if_toc_extraction_is_complete(content, toc, model=None):
 
     Reply format:
     {{
-        "thinking": <why do you think the table of contents is complete or not>
+        "thinking": <why do you think the table of contents is complete or not>,
         "completed": "yes" or "no"
     }}
     Directly return the final JSON structure. Do not output anything else."""
@@ -147,7 +147,7 @@ def check_if_toc_transformation_is_complete(content, toc, model=None):
 
     Reply format:
     {{
-        "thinking": <why do you think the cleaned table of contents is complete or not>
+        "thinking": <why do you think the cleaned table of contents is complete or not>,
         "completed": "yes" or "no"
     }}
     Directly return the final JSON structure. Do not output anything else."""
@@ -210,7 +210,7 @@ def detect_page_index(toc_content, model=None):
 
     Reply format:
     {{
-        "thinking": <why do you think there are page numbers/indices given within the table of contents>
+        "thinking": <why do you think there are page numbers/indices given within the table of contents>,
         "page_index_given_in_toc": "<yes or no>"
     }}
     Directly return the final JSON structure. Do not output anything else."""