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:       Your garden is looking very beautiful this summer . The flowers are really colorful .  
 Person2:Thank you . I have roses , tulips , and daffodils . Do you like the rockery with the smaller flowers ?  
 Person1:        Yes , I do . Those are violets , aren ’ t they ?  
 Person2:Yes , they are . This afternoon , I ’ m going to prune the hedge .  
 Person1:        The lower branches on that tree are hanging very low . Would you like me to cut them off for you ?  
 Person2:Thank you ! That would be very kind of you . I have a saw in the garden shed .  
 Person1:        When the lower branches are removed , you ’ ll be able to sit under the tree .  
 Person2:Tomorrow , I ’ ll cut the grass . Then the garden will look perfect .  
 Person1:        Just make sure children don ’ t play in the flower beds and destroy the flowers . 

informal