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:       Let ’ s cross here .  
 Person2:You ’ re kidding . We ’ ll never make it across in one piece ! Let ’ s cross at the light .  
 Person1:        Now we have to walk all the way down to the end of the street .  
 Person2:If you want to cross here , be my guest . I don ’ t feel like dodging cars and scooters ! 

informal