def will_reciprocate(data_dict, index):
    """Searches the text of the request for phrases that suggest a promise to
    give pizza to someone else. data_dict is a dictionary of lists,and any given
    index in the lists corresponds to the same post for different keys.
    """
    title = data_dict["title"][index]
    body = data_dict["body"][index]
    phrases = ["pay it forward", "return the favor", "reciprocate"]
    for p in phrases:
        if p in title or p in body:
            return True
    return False