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 , Bill .  
 Person2:Hi , Jim .  
 Person1:        Where is that cool guy , Dick ? I haven ’ t seen him for two weeks .  
 Person2:He ’ s been sick since he came back from Italy .  
 Person1:        Bummer , I ’ m sorry to hear that , is he better now ?  
 Person2:Yes , Doctor William said that he could come back to work ASAP . 

formal