<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def advance_for_next_slice(self, recovery_slice=False):
 """Advance self for next slice. Args: recovery_slice: True if this slice is running recovery logic. See handlers.MapperWorkerCallbackHandler._attempt_slice_recovery for more info. """

    self.slice_start_time = None
    self.slice_request_id = None
    self.slice_retries = 0
    self.acquired_once = False
    if recovery_slice:
      self.slice_id += 2
    else:
      self.slice_id += 1