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: All the soldiers in that country are armed to the teeth .
Person2:What's happening in that country ?
Person1: The neighboring country is threatening their sovereignty with its nuclear bombs .
Output:
formal