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 ! You have reached the offices of Maddox and McKnight , can I help you ?  
 Person2:Yes , my name is Max Richards . May I please speak to George Nelson ? I have already called several times . It seems I always catch him out of the office .  
 Person1:        Oh , I'm sorry . Mr . Nelson is away at the moment . I'm sorry that you keep missing him while he is out of the office . Would you like to leave a message ?  
 Person2:I'm sorry , I didn't hear you clearly . Could you repeat that please ?  
 Person1:        Certainly . Mr . Nelson can not take your call at the moment because he is away . He stepped out of the office for the whole afternoon and is not expected back until tomorrow morning . His schedule is very unpredictable at times , so the best way to reach him is to first make an appointment by email or text messaging .  
 Person2:Can I leave a message for him please ?  
 Person1:        Of course , can you leave your name and number ? I'm sure Mr . Nelson will return your call as soon as he is able .  
 Person2:My name is Max Richards , my phone number is 898-3423 . Could you ask him to call me back as soon as he gets back , please ? I have a rather timely matter to discuss with him .  
 Person1:        Can you tell me what it's about ? I can make a note of it , so Mr . Nelson is aware and prepared when he returns your call .  
 Person2:Yes , please let him know I would like to discuss the Girard case with him . 

informal