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:       What is the weather like today ?  
 Person2:It stops snowing , but there's a bit wind .  
 Person1:        And the streets are covered with ice . Do you know what the temperature is today ?  
 Person2:I missed today's weather for cast in the radio  
 Person1:        It seems 10 degree below zero at least . I don't mind the cold weather , but do hate when it get slippery .  
 Person2:The ice is soon be thick for skating . I'm so fine to want a sport  
 Person1:        That's fine . let's go skating together tomorrow . 

formal