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:       When can you get the finished product to me ?  
 Person2:We should have it put together by the end of next week .  
 Person1:        Great ! That'll be ahead of schedule ! Good work .  
 Person2:Well , as the saying goes – we aim to please ! 

informal