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:       I think we have everything in the contract . Shall we sign it ?  
 Person2:Wait a minute . I think we have missed an important point . We should include an arbitration clause in the contract .  
 Person1:        I believe we can solve disputes through an amicable negotiation .  
 Person2:I hope so . too . But I still think the provision of arbitration is of great importance to both of us .  
 Person1:        All right . I agree with you . But where do we hold arbitration ?  
 Person2:I suggest the arbitration be held in a third country .  
 Person1:        It sounds reasonable . The clause should be like this - any disputes arising from the execution of this contract shall be settled in a friendly way . If no settlement can be reached through consul - nation and conciliation , the disputes shall be submitted for arbitration by a mutually nominated arbitrator . The arbitrator's decision on the dispute is final and binding on the both parties .  
 Person2:Ok . 

formal