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:       I heard Betty lost her tennis match this morning , so she's out of the tournament . 
 Person2:Really ? What a shame ! I thought she was going to win this one . 
 Person1:        Me , too . I'm sure she'll do better in the next tournament . 

informal