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 feel like going for a drink , it's been a long day . 
 Person2:Great idea ! Peter , I could use the drink . 
 Person1:        How about the new bar across road ? 
 Person2:Sounds good . The food there is fantastic , too . 
 Person1:        I agree , I had lunch there last week . 
 Person2:excellent ! That sounds like a plan . 

informal