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:       Good morning ! My name is John White , import manager of the Garden Trading Company of New York .  
 Person2:Oh , how do you to Mr . White ? My name is Li Ming , here is my card .  
 Person1:        Nice to meet you Mr.Li . We have learned about that you specialize in the export business of electronic products . As you enjoy the highest reputation in the commercial circle , we'd be please to enter into business relations with your firm .  
 Person2:We share the same desire . Have you seen the display of our products in the exhibition hall downstairs ?  
 Person1:        Yes , I had a look just now , I feel we can do a lot of business in this line .  
 Person2:Sure , we can . You know , we are been in the line for more than twenty years , and I think our price are competitive comparing with those in the world market .  
 Person1:        Our company enjoys a history of more than twenty years , we have wide connection with wholesalers and retailers all over the America , and we have good reputation in the commercial circle .  
 Person2:Thank you for your information , we can hold more talks later on business details .  
 Person1:        Sure . 

formal