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:       Mr . Chandler will be our new partner , so his visit this time will be extremely important for our cooperation in future , because it may decide whether Mr . Chandler sign the trade contract with us or not . Do you have some idea ?  
 Person2:I suppose we can bring him to visit our company , as well as our display room . In this way , he can know more about our company and our potential power . In my opinion , visiting the factory will help him learn our manufacturing process very much .  
 Person1:        En , you are right , and he will trust us and maybe the contract will be signed soon . But remember to keep some skills of our manufacturing secret . On one hand , show his our best side ; on the other hand , do not show too much to protect our own business secrets .  
 Person2:Well , I understand .  
 Person1:        Please make a detailed schedule on the visit this afternoon . 

formal