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  
 Person2:Hi Angela , it's Dan .  
 Person1:        Hi B . How are you ?  
 Person2:Good .  
 Person1:        I called you yesterday . Did you get my message ?  
 Person2:Yes , I was taking a shower when you called . I saw that you called and I tried to call you back , but I think your phone was off .  
 Person1:        No problem . I wanted to remind you that my friend is getting married next week . You're still coming to the wedding with me , right ?  
 Person2:Oh , is that next week ?  
 Person1:        Yes . Did you forget ?  
 Person2:No , of course not . I already bought them a present .  
 Person1:        That's good . I want to invite Megan also . Next time you see her , can you tell her for me .  
 Person2:Sure . Does she know your friend ?  
 Person1:        Yes , I think they might have gone to the same college or something like that . I'm not exactly sure how they know each other .  
 Person2:Are we all going to drive together ?  
 Person1:        Yes . I'll pick you up first , and then we'll go get Megan . 

formal