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:       I'm going for a walk , Yi-jun . I need some time to myself . 
 Person2:Don't you want to go to the visiting hours ? This sheet says they are tonight . 
 Person1:        I just can't right now . Everyone will be talking about Taylor and ... 
 Person2:... and maybe that's what we both need . 
 Person1:        I need to come to grips with his death first . And I also need to prepare a eulogy in case I'm asked to speak tomorrow . 
 Person2:OK , but don't forget I'm here for you , and I know how you feel . It's my loss , too . 

informal