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:       Hi , did you call for an exterminator ?  
 Person2:Yes ! Thank goodness you ’ re here.These bugs are driving us crazy !  
 Person1:        What sort of pest are we dealing with ?  
 Person2:We just bought this house and it is infected with just about everything . We have termites in the wood , cockroaches all over the place , and last night I saw a huge rat out in the backyard !  
 Person1:        Well , there ’ s nothing we can ’ t handle . I ’ ll spray the floorboards and walls to get rid of the cockroaches , but the termites will be harder to get rid of . We will have to cover the entire house and fu  
 Person2:No problem , just get rid of the bugs ! 

informal