<ng-template pTemplate="emptymessage">
   <tr>
     <td>
         No records found
      </td>
    </tr>
 </ng-template>

this.myService
    .myHttpCallFunction(params)
    .pipe(
        finalize(() => this.loading = false)
    )
    .subscribe(
        (result: JsendResponse) => this.data = result.data,
         errors => this.errors = errors
    );

<p-table [value]="data?.data" [columns]="settings.columns" [lazy]="true" [loading]="loading">