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 help me do an internet search ?  
 Person2:Sure . What do you want to find ?  
 Person1:        I want to find information on World War Two .  
 Person2:Well , can you be more specific ? There are a lot of websites about that .  
 Person1:        Yes , I want to know about the Normandy Landing .  
 Person2:Ok . Well , go to www.google.com , and type in Normandy Landing .  
 Person1:        Oh , wow ! There are lot of sites .  
 Person2:Here , try this one . It's a good site about Normandy Landing .  
 Person1:        Thanks .  
 Person2:For detailed information , however , you should read a history book .  
 Person1:        Thanks . If I am interested , I'll go to the library . 

informal