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 really want to go to the beach this weekend . 
 Person2:That sounds like fun . What's the weather going to be like ? 
 Person1:        I heard that it's going to be warm this weekend . 
 Person2:Is it going to be perfect beach weather ? 
 Person1:        I believe so . 
 Person2:Good . I hope it doesn't cool off this weekend . 
 Person1:        I know . I really want to go to the beach . 
 Person2:But you know that California weather is really unpredictable . 
 Person1:        You're right . One minute it's hot , and then the next minute it's cold . 
 Person2:I really wish the weather would just stay the same . 
 Person1:        I do too . That way we can have our activities planned ahead of time . 
 Person2:Yeah , that would make things a lot easier . 

formal