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:       You look great !  
 Person2:Thanks to you . I'm totally pumped up .  
 Person1:        So you are happy that you made the decision to join us .  
 Person2:I surely am . But still there is one single problem .  
 Person1:        What's that ?  
 Person2:I eat more and more these days . And it puts even more weight on me .  
 Person1:        It's not good to start with too much work-out at the beginning . What about trying something else ?  
 Person2:I'd love to do that . What do you recommend ?  
 Person1:        More and more people are warm up to Yoga these days . Do you want to have a try ?  
 Person2:Do you think it's a good option for health and relaxation ?  
 Person1:        Absolutely . But it takes great perseverance to master .  
 Person2:I can so that .  
 Person1:        Here is a free class going on right over there . Go and join them .  
 Person2:How did it go ?  
 Person1:        Everything was okay when it started , but the music made me drowsy . So I think I may have dozed off for a minute over there . 

informal