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:       How do you do ? I need your help in selecting a foreign market to invest !  
 Person2:Fine . I have your letter and I've made some notes .  
 Person1:        How can I find out what countries to invest ?  
 Person2:We have quite a lot of import and export information and can give you figures on population , consumption , production , and foreign exchange reserves .  
 Person1:        Great . I want to get an idea for the purchasing ability in various countries .  
 Person2:But you're also going to have to give some attention to trade restrictions . You can get much information about environment of investment . 

informal