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:       It seems so strange to be here , burying you , but it's not you .  
 Person2:Ashes to ashes and dust to dust ...  
 Person1:        This has been the worst and best day of my life , Taylor . They kept you in the hospital , and ...  
 Person2:I'll tell you all about it another day .  
 Person1:        But you're OK ? It was nothing serious , was it ?  
 Person2:You ladies look very elegant in black . But I don't want you to wear black in my honor for a long time yet to come ... 

informal