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:       In my wedding ceremony , where do my parents sit in the church ?  
 Person2:The bride's parents ' seating arrangement is on the left side of the aisle and the groom's parents is on the right side .  
 Person1:        Do friends of the bride always sit on one side of the church and friends of the groom on the other ?  
 Person2:They usually do . 

formal