How do I delete text conversations from a Samsung Galaxy S2?

The Samsung Galaxy S2, like many other modern phones, stores texts as a conversation showing the two peoples back and forth. Although this tidies up your inbox and outbox it can mean that you end up with really long text conversations that just end up going on forever. Alternatively you may just want to delete an angry row with a friend or even delete something before someone else sees it. If we click on the "Messaging" icon on the home screen we end up getting an image similar to the picture on the right.

To delete one of the conversations we need to hold down on one of them. For the sake of this example it's going to be "Kt" that gets deleted. If you hold on the conversation you get a contextual menu like the one on the picture to the left. If you click on delete you will be asked if it's OK. Click OK and the conversation will be gone within seconds.