Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       Here are the leads from last week's exhibit as a trade show . There are about forty or so that are hot . You should contact them immediately , in the next twenty-four hours if you can . The rest are categorized according to potential and interest.You can see we've got our hot stack , our warm stack , our lukewarm , and our cold but not dead stack . 
 Person2:Haha ... please don't tell me you've got a dead stack . I hate making cold calls ... 
 Person1:        Don't worry , most of the leads on mildly interested , if not strongly interested . We've just got to make sure the Hot ones are contacted right away . And even the contacts that for what ever reason aren't prepared to make an order now , they might be interested in the future . Please be conscanciouss about getting a hold of everyone of these leads . We've spent a big chunk of marketing budget to find these people . I don't want our investment to go down the drain . 
 Person2:Don't worry , I've gotchy covered . 

informal