How do I create a quote on Malt via a conversation thread?

From the conversation thread with your client, click on "Create a Quote". 

This will open up a new window where you can outline, task-by-task, what services and deliverables you plan to offer (including the price for each).

Malt's quote-builder adds the prices for all of the tasks you've outlined up for you automatically, which means, all that's left to do is send your quote to the client!