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 , George ! Haven't seen you for some time.Where have you been ?  
 Person2:I've been away in Paris for the last two month.Glad to see you again.How are you doing ?  
 Person1:        Very well.Thank you.Did you have a good time there ?  
 Person2:Yes , I had a wonderful time . 

formal