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:       Excuse me , I wonder if you could help me ?  
 Person2:Of course , what can I do for you ?  
 Person1:        Well , I hate to have to say this , but I'm not happy with my room .  
 Person2:Oh , what exactly is problem ?  
 Person1:        Well , the traffic is very loud . I got no sleep last night .  
 Person2:Oh , I'm so sorry , Sir . I'll see what I can do about that . 

informal