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:       Has the chief accepted our plan ?  
 Person2:Not yet . I guess we should send Jim along to talk to the chief since he is such an apple polisher . I am sure he can help .  
 Person1:        Let ’ s have a try . 

formal