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:       I just got a telegram from Margaret and Greg .  
 Person2:Are they coming to Chicago again ?  
 Person1:        Yes . They ’ re coming the beginning of August .  
 Person2:Oh , good ! We can all get together again .  
 Person1:        I ’ m glad they ’ re coming in August . Maybe Greg and I can play some golf or get tickets to a baseball game .  
 Person2:And Margaret and I can take the dog and go jogging in the park .  
 Person1:        Remember the garden party they gave when we were in England ?  
 Person2:Oh , yes . We all sat on the grass , and Margaret played the guitar and sang Greek songs .  
 Person1:        I had a great time . It ’ ll be good to see them again . 

informal