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:       Would you like to come by and play bridge ? 
 Person2:Well , let's see.Why don't we go dancing for a change ? We haven't done that for a long time . 
 Person1:        Well , to tell the truth , I don't really feel like it tonight . I had a pretty hard day and I'm sort of tired . 
 Person2:Hmm.Well , in that case , we could go to the movies . 
 Person1:        Oh , we always go to the movies.Can ' t we do something different ? 
 Person2:Well , do you have any suggestions ? 
 Person1:        Let's see.How do you feel about playing bridge ? 
 Person2:It's OK with me , but we don't have any beer and things . 
 Person1:        Well , shall I call Janet and ask her and Tom to come over , and I'll go to the store and buy some stuff . 
 Person2:OK . 
 Person1:        Hello , Janet.It ' s me ... Oh , fine.Just fine.Say , Janet , I was wondering if you and Tom were doing anything tonight ... No ? Well.would you like to come by our place and play a few hands of bridge ? 

informal