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:       Well , that's it . 7 appointments in Paris at beginning of next week , and 4 in Frankfurt at the end of the week .  
 Person2:It's certainly a tight schedule .  
 Person1:        Now it's a question of getting there . I need a flight to Paris on Sunday evening and a hotel in Paris for 3 nights . I have to be in Frankfurt by 11 on Thursday morning . And I will need a hotel for one night . I will head home on Friday .  
 Person2:At what time ?  
 Person1:        My last appointment is at 3 , so I should be free by 5 at the very latest . I think I could get to the airport by 6 .  
 Person2:Do you know how far you will be from the airport at 5 ?  
 Person1:        No , not really .  
 Person2:So you are not sure how long it will take to get there ?  
 Person1:        No , but I am sure it won't take more than an hour .  
 Person2:Don't forget it's Friday nighty . If Frankfurt's anything like London , everybody will be leaving for the weekend . It will be a rush hour and traffic might be moving very slowly .  
 Person1:        You are a pessimist .  
 Person2:I am a realist . 

formal