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:       Excuse me , sir , Is this the road to the peace Store ?  
 Person2:You could get there this way , but it'd be faster to go along the Wort Street .  
 Person1:        Where's Wort Street , please ?  
 Person2:Turn right at the third intersection , you'll see the street and then walk along the street to the south .  
 Person1:        How far is it from the Wort Street ?  
 Person2:Just walk for a few minutes , you'll find it .  
 Person1:        Thank you very much . 

informal