import re


def chunk_text(text, max_chars=2040):
    sentences = re.split(r'(?<=[.!?])\s+', text)
    chunks = []
    current_chunk = []
    current_length = 0
    for sentence in sentences:
        sentence_length = len(sentence)
        if current_length + sentence_length <= max_chars:
            current_chunk.append(sentence)
            current_length += sentence_length
        else:
            if current_chunk:
                chunks.append(' '.join(current_chunk))
            current_chunk = [sentence]
            current_length = sentence_length
    if current_chunk:
        chunks.append(' '.join(current_chunk))
    return chunks