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:       Do you have this design with only one breast pocket ?  
 Person2:Let me see.Oh , we have the design but not the same color as this one .  
 Person1:        It's a pity . I'm afraid that's too loud for me.Thank you .  
 Person2:You're welcome . 

informal