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