Will my old whatsapp convo still be there?

I haven't been on whatsapp in around 4 months.
I completely deleted the app and not too long ago an old friend said she sent me a picture on there around 2 months ago. If I reinstall the app will the conversation still be there? Also on my iPhone it's not letting me restore anything because I don't have enough iCould space. So does that mean I can't retrieve this conversation?

The conversations are usually backed up on whatsapp itself!

The conversation will definitely get restored!