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:       Where did you work in the past ?  
 Person2:For the past 5 years , I have been in an Ericsson ( China ) Communication Co , Ltd .  
 Person1:        What's your title in the company ?  
 Person2:My title was Project Manager . There were almost 100 people under my supervision . 

formal