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:       Did you have a good weekend ? 
 Person2:Well I wanted to go for a picnic but it rained too much . 
 Person1:        Oh I see . So what did you do then ? 
 Person2:I washed my car instead . 
 Person1:        Ahh . And how about on Sunday ? Did you watch the football ? 
 Person2:No I didn ’ t . I worked in the morning then I played tennis with my husband . 

formal