instruction:
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'.
question:
Person1: Hi , Ellen . That outfit looks terrific !
Person2:Thanks , Jim . I didn ' t think guys paid attention to stuff like that .
Person1: No , we just don ' t usually admit it !
Person2:Well , thanks for the compliment anyway !
answer:
informal

question:
Person1: Tony looks very handsome in the suit .
Person2:He prefers suits to jackets .
Person1: Judge from his look , he's a very serious person .
Person2:As a matter of fact , he is .
answer:
informal

question:
Person1: It seldom rains this summer .
Person2:Yeah , some places are very short of water .
Person1: Because of pollution and other things , our environment has become worse and worse .
Person2:You see , . This time I traveled to the West . When I looked out of the windows of the rain , all the lands that I could see are as dry as a bone .
Person1: It is serious .
answer:
informal