diff --git a/src/modules/chat/DTO/create-chat.dto.ts b/src/modules/chat/DTO/create-chat.dto.ts
index d461c96..eb8d6fa 100755
--- a/src/modules/chat/DTO/create-chat.dto.ts
+++ b/src/modules/chat/DTO/create-chat.dto.ts
@@ -1,19 +1,24 @@
-import { ApiProperty } from "@nestjs/swagger";
-import { IsNotEmpty, IsOptional, IsString, IsUrl, Length } from "class-validator";
+import { ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
+import { IsNotEmpty, IsOptional, IsString, Length } from "class-validator";
 import { AttachmentType } from "../interfaces/chat";
 import { TicketMessageEnum } from "../../../common/enums/message.enum";
 
 
 export class CreateChatDto {
-  @IsNotEmpty({ message: TicketMessageEnum.MESSAGE_REQUIRED })
+  @IsOptional()
   @IsString({ message: TicketMessageEnum.MESSAGE_STRING })
-  @Length(1, 5000, { message: TicketMessageEnum.MESSAGE_LENGTH })
-  @ApiProperty({ description: "The message content of the ticket" })
-  content: string;
+  @Length(0, 5000, { message: TicketMessageEnum.MESSAGE_LENGTH })
+  @ApiProperty({ description: "The message content of the ticket", required: false })
+  content: string = '';
 
   @IsOptional()
   @IsNotEmpty({ message: TicketMessageEnum.ATTACHMENT_REQUIRED })
   @ApiProperty({ description: "attachment url", example: [{ type: '', url: '' }] })
   attachments?: AttachmentType[];
+
+  @ApiPropertyOptional({ description: "Parent chat ID for reply" })
+  @IsOptional()
+  @IsString()
+  parentId?: string;
 }
 
diff --git a/src/modules/chat/providers/chat.service.ts b/src/modules/chat/providers/chat.service.ts
index f826f58..abecbff 100755
--- a/src/modules/chat/providers/chat.service.ts
+++ b/src/modules/chat/providers/chat.service.ts
@@ -116,18 +116,31 @@ export class ChattService {
   }
 
   async createChat(refId: string, dto: CreateChatDto, user?: User, admin?: Admin) {
-    const { content, attachments } = dto
+    const { content = '', attachments, parentId } = dto
 
     if (!user && !admin) {
       throw new BadRequestException("One of user or admin is required")
     }
 
+    if (!content.trim() && (!attachments || attachments.length === 0)) {
+      throw new BadRequestException("Message content or attachment is required")
+    }
+
+    let parent: Chat | undefined
+    if (parentId) {
+      parent = await this.findOneOrFail(parentId)
+      if (parent.refId !== refId) {
+        throw new BadRequestException("Parent message does not belong to this chat")
+      }
+    }
+
     const ticket = this.chatRepository.create({
       content,
       attachments,
       admin,
       user,
-      refId
+      refId,
+      parent,
     })
 
     await this.chatRepository.em.persistAndFlush(ticket)
@@ -137,6 +150,7 @@ export class ChattService {
   }
 
   async deleteChat(chat: Chat) {
+    await this.em.nativeUpdate(Chat, { parent: chat.id }, { parent: null })
     await this.em.removeAndFlush(chat)
     return true
   }
@@ -165,7 +179,7 @@ export class ChattService {
 
   async findOneOrFail(ticketId: string) {
     const ticket = await this.chatRepository.findOne({ id: ticketId },
-      { populate: ['user'] })
+      { populate: ['user', 'admin', 'parent'] })
     if (!ticket) {
       throw new BadRequestException('ticket not found!')
     }
diff --git a/src/modules/chat/repositories/chat.repository.ts b/src/modules/chat/repositories/chat.repository.ts
index 866352a..483db5a 100755
--- a/src/modules/chat/repositories/chat.repository.ts
+++ b/src/modules/chat/repositories/chat.repository.ts
@@ -34,7 +34,7 @@ export class ChatRepository extends EntityRepository<Chat> {
       limit,
       offset,
       orderBy: { createdAt: 'desc' },
-      populate: ['admin', 'user']
+      populate: ['admin', 'user', 'parent', 'parent.admin', 'parent.user'],
     });