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:       welcome back ! How was your vacation ? 
 Person2:it was fantastic , but I'm glad to be back ! Being a tourist is really tiring ! 
 Person1:        where did you end up going ? 
 Person2:because it's off-season , we got a really good package deal to Paris , so we went there . 
 Person1:        I've always wanted to go to Paris . The Eiffel Tower is one of the most famous tourist attractions in the world ! Did you go to the top ? 
 Person2:that was the first thing we did . I have a few pictures . Do you want to see them ? 
 Person1:        sure . What's this one a picture of ? 
 Person2:oh , that's a picture of me on our fourth day of travelling . I'm standing next to a famous foundation in the centre of the city . 
 Person1:        you don't look very happy in that picture . 
 Person2:no , by that time , I was sick of sightseeing . I had had enough of art galleries , cathedrals , fountains , statues , and palaces ! 
 Person1:        so what did you do ? 
 Person2:we spent that afternoon walking around a flea market . We had a few coffees , watched a movie , and went for a swim in the pool at the hotel . 
 Person1:        my travel agent always reminds me to plan a day of relaxing for every 3 days of sightseeing . Did you go to the Louvre ? 
 Person2:of course ! You can't go to Paris without going to their famous art gallery ! I was surprised by how small the Mona Lisa was though . 
 Person1:        that's what everyone says ! I can't wait to see it for myself some day . 

informal