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:       Why don't we get ourselves a new car ? The old one's falling apart .  
 Person2:What a good idea !  
 Person1:        What kind shall we get ?  
 Person2:We could go to more places this time , if you liked .  
 Person1:        Yes , fine .  
 Person2:When shall we go and look ?  
 Person1:        Why not sometime next week ?  
 Person2:No , let's go on Saturday .  
 Person1:        OK .  
 Person2:Where shall we go ?  
 Person1:        There's a car dealer down the road . How about going there ?  
 Person2:No , I don't like that place . Why don't we try the garage Martin recommended ?  
 Person1:        Fine , We'll do that . 

informal