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:       Hello , is this apartment management ?  
 Person2:Can I help you ?  
 Person1:        Yes , this is the tenant of apartment ten . I guess my kitchen sink is clogging up again , and so is the bathtub .  
 Person2:Alright . I'll send someone over tomorrow .  
 Person1:        Um , I'd really appreciate it if you send someone over to fix it today . It's really a bother . I can't cook or take a shower .  
 Person2:Fine , I'll be up in a few minutes .  
 Person1:        Thanks , I appreciated it . 

informal