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:       Oh , no . It looks like we're late .  
 Person2:Let's just sit in the back . We can still hear the service from here .  
 Person1:        There're so many people here . Where are Rich and Cath and Taylor's parents ?  
 Person2:They're probably up front . The preacher's about to speak . Let's listen .  
 Person1:        That was such a touching speech . He must have really known Taylor well .  
 Person2:Oh , how I wish this all wasn't happening ! 

formal