You are given a sentence from a conversation between a human and a virtual assistant. Your task is to classify the sentence into one of the following five action categories - INFORM, INFORM_INTENT, OFFER, REQUEST, REQUEST_ALTS. If the sentence is about informing something, generate 'INFORM'. If it is about requesting something, generate 'REQUEST'. If the sentence mentions requesting an alternative option than the one provided, generate 'REQUEST_ALTS'. Similarly, generate 'OFFER' if the sentence is offering some information. If the sentence is about showing intent to do something, generate 'INFORM_INTENT'.

Example Input: The Ben Harper at Pier 17 has 4 dates. The first is next Wednesday.
Example Output: OFFER

Example Input: Yeah, that works for me. Where's the venue?
Example Output: REQUEST

Example Input: Are there any interesting events?
Example Output:
INFORM_INTENT