Chatting a Ghanaian girl and I'm getting monotone replies.

In a conversation with a lady ,fine one, and i'm giving her vibes ,neat flirty lines on WhatsApp and all she keeps replying me with is 'Lol' laughing emoji , and 'pls o'.

What can I do for this chat to go in a better direction ? Me I no go fit continue plus this one sided convo.