QBChatDialog dialog = DialogUtils.buildPrivateDialog("USER_ID of other user");
QBRestChatService.createChatDialog(dialog).performAsync(new QBEntityCallback<QBChatDialog>() {
@Override
public void onSuccess(QBChatDialog result, Bundle params) {
//if dialog created successfully
//result param return all details about that dialog
}
@Override
public void onError(QBResponseException responseException) {
//error creating dialog
}
});