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:       Have you read the new rules about using cell phone at work ?  
 Person2:Yes , not bad . Like turn your cell phone ringer off and find a private place to make calls which it ’ s showing your respect to your co-workers .  
 Person1:        Well , but for this one , don ’ t bring your cell phone to meetings , I think it is not reasonable . What if there are some important calls ?  
 Person2:Well , this one is not compulsory . It is just suggestion .  
 Person1:        I didn ’ t pay attention to that . 

formal