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:       You look pale , Paul.What ' s wrong ?  
 Person2:I've got a headache .  
 Person1:        I'm sorry to hear that.Anything I can do for you ?  
 Person2:No , thank you . I'll take an aspirin and see how it goes . 

formal