DOHA, March 14 (Xinhua) -- Taliban's political chief Mullah Abdul Ghani Baradar said on Thursday he was optimistic about the talks with the United States.

This came in an eight-minute interview aired by Al Jazeera news channel.

"We are very hopeful for the peace talks, because the latest round had some good dialogues which paved the way for more progress regarding the peace process," he said.

"The Taliban assures the neighboring, regional and other countries that the upcoming system will not be against anyone. We are not under the influence of anyone, and have no aim to harm anyone," said Baradar.

He asked all the Taliban fighters to remain composed and not to become arrogant despite the fact that "they achieved victory in political and military areas."

The U.S. negotiator Zalmay Khalilzad said on Tuesday in a series of tweets that all sides want an end to the war that started in 2001.

The Taliban's role in Afghanistan after a possible agreement was not defined yet and it denied to sit with the Afghan government of President Ashraf Ghani.