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:       The order is so urgently required that we have to ask you to speed up shipment . If shipment is too late , we'll have to turn to other suppliers .  
 Person2:I am sorry , but we can't advance shipment . The manufacturers are fully committed . They have no stock on hand .  
 Person1:        Can you find some way for an earlier delivery ?  
 Person2:How's this then ? We propose partial shipment . We can ship whatever is ready to meet your urgent need instead of waiting for the whole lot to get ready .  
 Person1:        Sounds like a good idea .  
 Person2:We propose to deliver 50 % in June and the balance in Aug .  
 Person1:        I agree with your proposal . 

informal