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:       You seem to be in the seventh heaven . What's put you on ? 
 Person2:Sarah and I could see eye to eye with each other . 
 Person1:        Did she give up her decision to marry Dick ? 
 Person2:No , I encourage her to go her own way , but she's now having a change of heart . 

informal