Sept 12 (Reuters) - Zendesk Inc investor Light Street Capital Management on Monday reaffirmed its decision to vote against the software firm's go-private deal with investment firms Hellman & Friedman and Permira.

In a letter to the company board, Light Street also asked Zendesk shareholders to postpone the voting on the deal, which is due Sept. 19.

Zendesk did not immediately respond to a request for comment. (Reporting by Tiyashi Datta in Bengaluru; Editing by Vinay Dwivedi)