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:       Can you speak French ?  
 Person2:Yes , I can , but not very well .  
 Person1:        Can you understand your Spanish teacher ?  
 Person2:More or less . How well do you understand Mr . Wang , your Chinese teacher ?  
 Person1:        About 40 percent , if he speaks slowly.When he speaks fast , I can only catch a word here and there . But Mr . Wang is an excellent Chinese teacher.With his help , my Chinese is getting better and better e 

formal