diff --git a/packages/basic.gblib/services/KeywordsExpressions.ts b/packages/basic.gblib/services/KeywordsExpressions.ts
index 314928d0..b8bd9cd8 100644
--- a/packages/basic.gblib/services/KeywordsExpressions.ts
+++ b/packages/basic.gblib/services/KeywordsExpressions.ts
@@ -637,10 +637,18 @@ export class KeywordsExpressions {
     ];
 
     keywords[i++] = [
-      /^\s*(.*)\=\s*(datediff)(\s*)(.*)/gim,
+      /^\s*((?:[a-z]+.?)(?:(?:\w+).)(?:\w+)*)\s*=\s*(datediff)(\s*)(.*)/gim,
       ($0, $1, $2, $3, $4) => {
         const params = this.getParams($4, ['date1', 'date2', 'mode']);
-        return `await dk.getDateDiff ({pid: pid, ${params}})`;
+        return `${$1} = await dk.getDateDiff ({pid: pid, ${params}})`;
+      }
+    ];
+
+    keywords[i++] = [
+      /^\s*((?:[a-z]+.?)(?:(?:\w+).)(?:\w+)*)\s*=\s*(user of)(\s*)(.*)/gim,
+      ($0, $1, $2, $3, $4) => {
+        const params = this.getParams($4, ['username']);
+        return `${$1} = await sys.getUser ({pid: pid, ${params}})`;
       }
     ];
 
diff --git a/packages/basic.gblib/services/SystemKeywords.ts b/packages/basic.gblib/services/SystemKeywords.ts
index 7e0bbd1f..8daf9274 100644
--- a/packages/basic.gblib/services/SystemKeywords.ts
+++ b/packages/basic.gblib/services/SystemKeywords.ts
@@ -62,6 +62,7 @@ import { KeywordsExpressions } from './KeywordsExpressions.js';
 import { ChatServices } from '../../gpt.gblib/services/ChatServices.js';
 import mime from 'mime-types';
 import exts from '../../../extensions.json' assert { type: 'json' };
+import { SecService } from '../../security.gbapp/services/SecService.js';
 
 /**
  * @fileoverview General Bots server core.
@@ -464,6 +465,22 @@ export class SystemKeywords {
     await min.conversationalService.sendMarkdownToMobile(min, null, mobile, message);
   }
 
+  /**
+   * Get a user object from a alias.
+   *
+   * @example user = USER "someone"
+   *
+   */
+  public async getUser({ pid, username }) {
+    const { min } = await DialogKeywords.getProcessInfo(pid);
+    let sec = new SecService();
+    const user = await sec.getUserFromUsername(min.instance.instanceId, username);
+
+    return {displayName: user.displayName,
+      mobile: user.userSystemId, email: user.email};
+  }
+
+
   /**
    * Sends a SMS message to the mobile number specified.
    *
diff --git a/packages/security.gbapp/services/SecService.ts b/packages/security.gbapp/services/SecService.ts
index 1c10026f..d4c40eb2 100644
--- a/packages/security.gbapp/services/SecService.ts
+++ b/packages/security.gbapp/services/SecService.ts
@@ -227,6 +227,15 @@ export class SecService extends GBService {
     });
   }
 
+  public async getUserFromUsername(instanceId: number, username: string): Promise<GuaribasUser> {
+    return await GuaribasUser.findOne({
+      where: {
+        instanceId: instanceId,
+        userName: username
+      }
+    });
+  }
+
 
   /**
    * Get a dynamic param from user. Dynamic params are defined in .gbdialog SET