diff --git a/src/converter/converter_main.cc b/src/converter/converter_main.cc
index 19948d1cf..da2f428b1 100644
--- a/src/converter/converter_main.cc
+++ b/src/converter/converter_main.cc
@@ -280,7 +280,7 @@ void PrintSegments(const Segments &segments, std::ostream *os) {
 
 bool ExecCommand(const ConverterInterface &converter, const std::string &line,
                  const commands::Request &request, config::Config *config,
-                 ConversionRequest *conversion_request, Segments *segments) {
+                 Segments *segments) {
   std::vector<std::string> fields =
       absl::StrSplit(line, absl::ByAnyChar("\t "), absl::SkipEmpty());
 
@@ -291,16 +291,21 @@ bool ExecCommand(const ConverterInterface &converter, const std::string &line,
 
   CHECK_FIELDS_LENGTH(1);
 
-  const std::string &func = fields[0];
-
   composer::Composer composer(&composer::Table::GetDefaultTable(), &request,
                               config);
-  conversion_request->set_composer(&composer);
+  commands::Context context;
+  ConversionRequest conversion_request =
+      ConversionRequest(&composer, &request, &context, config);
+  conversion_request.set_max_conversion_candidates_size(
+      absl::GetFlag(FLAGS_max_conversion_candidates_size));
+  conversion_request.set_create_partial_candidates(
+      request.auto_partial_suggestion());
 
+  const std::string &func = fields[0];
   if (func == "startconversion" || func == "start" || func == "s") {
     CHECK_FIELDS_LENGTH(2);
     composer.SetPreeditTextForTestOnly(fields[1]);
-    return converter.StartConversion(*conversion_request, segments);
+    return converter.StartConversion(conversion_request, segments);
   } else if (func == "convertwithnodeinfo" || func == "cn") {
     CHECK_FIELDS_LENGTH(5);
     Lattice::SetDebugDisplayNode(
@@ -316,19 +321,19 @@ bool ExecCommand(const ConverterInterface &converter, const std::string &line,
   } else if (func == "startprediction" || func == "predict" || func == "p") {
     if (fields.size() >= 2) {
       composer.SetPreeditTextForTestOnly(fields[1]);
-      return converter.StartPrediction(*conversion_request, segments);
+      return converter.StartPrediction(conversion_request, segments);
     } else {
-      return converter.StartPrediction(*conversion_request, segments);
+      return converter.StartPrediction(conversion_request, segments);
     }
   } else if (func == "startsuggestion" || func == "suggest") {
     if (fields.size() >= 2) {
       composer.SetPreeditTextForTestOnly(fields[1]);
-      return converter.StartSuggestion(*conversion_request, segments);
+      return converter.StartSuggestion(conversion_request, segments);
     } else {
-      return converter.StartSuggestion(*conversion_request, segments);
+      return converter.StartSuggestion(conversion_request, segments);
     }
   } else if (func == "finishconversion" || func == "finish") {
-    converter.FinishConversion(*conversion_request, segments);
+    converter.FinishConversion(conversion_request, segments);
     return true;
   } else if (func == "resetconversion" || func == "reset") {
     converter.ResetConversion(segments);
@@ -348,7 +353,7 @@ bool ExecCommand(const ConverterInterface &converter, const std::string &line,
         if (!(converter.CommitSegmentValue(segments, i, 0))) return false;
       }
     }
-    converter.FinishConversion(*conversion_request, segments);
+    converter.FinishConversion(conversion_request, segments);
     return true;
   } else if (func == "focussegmentvalue" || func == "focus") {
     CHECK_FIELDS_LENGTH(3);
@@ -362,7 +367,7 @@ bool ExecCommand(const ConverterInterface &converter, const std::string &line,
     return converter.CommitSegments(segments, singleton_vector);
   } else if (func == "resizesegment" || func == "resize") {
     if (fields.size() == 3) {
-      return converter.ResizeSegment(segments, *conversion_request,
+      return converter.ResizeSegment(segments, conversion_request,
                                      NumberUtil::SimpleAtoi(fields[1]),
                                      NumberUtil::SimpleAtoi(fields[2]));
     } else if (fields.size() > 3) {
@@ -372,7 +377,7 @@ bool ExecCommand(const ConverterInterface &converter, const std::string &line,
             static_cast<uint8_t>(NumberUtil::SimpleAtoi(fields[i])));
       }
       return converter.ResizeSegment(
-          segments, *conversion_request, NumberUtil::SimpleAtoi(fields[1]),
+          segments, conversion_request, NumberUtil::SimpleAtoi(fields[1]),
           NumberUtil::SimpleAtoi(fields[2]), new_arrays);
     }
   } else if (func == "disableuserhistory") {
@@ -446,19 +451,10 @@ void RunLoop(std::unique_ptr<EngineInterface> engine,
   ConverterInterface *converter = engine->GetConverter();
   CHECK(converter);
 
-  commands::Context context = commands::Context::default_instance();
-  ConversionRequest conversion_request =
-      ConversionRequest(nullptr, &request, &context, &config);
-  conversion_request.set_max_conversion_candidates_size(
-      absl::GetFlag(FLAGS_max_conversion_candidates_size));
-  conversion_request.set_create_partial_candidates(
-      request.auto_partial_suggestion());
-
   Segments segments;
   std::string line;
   while (!std::getline(std::cin, line).fail()) {
-    if (ExecCommand(*converter, line, request, &config, &conversion_request,
-                    &segments)) {
+    if (ExecCommand(*converter, line, request, &config, &segments)) {
       if (absl::GetFlag(FLAGS_output_debug_string)) {
         PrintSegments(segments, &std::cout);
       }