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:       Good afternoon.madam.How can I help you ?  
 Person2:Someone has stolen my cell phone .  
 Person1:        I am sorry to hear that.Would you mind coming with me to my office and tell me what exactly happened there ?  
 Person2:OK . I left my cell phone in my room this morning before I want out.When I come back it was gone . I have looked every where in my room and I can't find it .  
 Person1:        Well , in that case . I will call the manger , you can talk directly with him . 

formal