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:       Sarah . You look terrible . What's wrong ?  
 Person2:My grandmother just passed away .  
 Person1:        I'm so sorry to hear that . When did this happen ?  
 Person2:A couple of days ago . I just go back from the funeral .  
 Person1:        Is there anything I can do ?  
 Person2:No ... not really . The sad thing is that I wasn't there when she died . I really wanted to be there one last time .  
 Person1:        I'm sure she knew you loved her . Did she pass away in the hospital ?  
 Person2:Yeah . She died in her sleep .  
 Person1:        I'm sorry she's gone .  
 Person2:At least she didn't suffer .  
 Person1:        I think your grandmother would want you to think of all the good times you spent together .  
 Person2:I know . But I miss her .  
 Person1:        When my grandmother passed away , I frequently visited her in the cemetery . I always talked to her . Even though she wasn't there , I somehow knew she heard what I said .  
 Person2:Yeah ? That's what I was thinking too . Thanks .  
 Person1:        It looks like you haven't eaten anything all day . We should get you something to eat .  
 Person2:You're right ... I should eat something . Let's go . 

informal