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: That sounds great. I want to reserve my tickets now. OK?
Example Output: INFORM_INTENT

Example Input: Can you search for events?
Example Output: INFORM_INTENT

Example Input: Is your memory failing? I repeat. It's at 5500 Phinney Avenue North and starts at 7:30 pm.
Example Output:
INFORM