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:       Hi , Craig ! How are you ?  
 Person2:Not so good . I have a terrible cold .  
 Person1:        Really ? That's too bad ! You should be at home in bed . It's really important to get a lot of rest .  
 Person2:Yeah , you're right .  
 Person1:        And have you taken anything for it ?  
 Person2:No , I haven't .  
 Person1:        Well , it's helpful to chop up some garlic and cook it in chicken stock . Then drink a cup every half hour . It really works !  
 Person2:Ugh ! 

informal