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:       You will never guess where my family is going for summer vacation .  
 Person2:Let me try . It has to be somewhere amazing , and far away ... Egypt ?  
 Person1:        How in the world did you guess that ? Did someone tell you already ?  
 Person2:Yes . I overheard your mom and my mom talking in the grocery store .  
 Person1:        I want to ride a camel and definitely see the pyramids !  
 Person2:I wish our family took outrageous summer vacations like yours .  
 Person1:        It helps that my dad is an archaeologist .  
 Person2:We'll get to go fishing at the river . I hate fish . 

informal