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:       Where are you going to spend your holidays this year , Tom ?  
 Person2:We may go abroad , my wife wants to go to Egypt , and I'd like to go there too . We haven't made up our mind yet .  
 Person1:        Will you travel by sea or by air ?  
 Person2:We may travel by sea . It's cheaper .  
 Person1:        I'm sure you'll enjoy yourselves . 

informal