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 morning , Jim !  
 Person2:Good morning , Emma ! A lovely day , isn't it ?  
 Person1:        Yes , it is . The sun is shining . There is no wind , only a pleasant breeze .  
 Person2:It is the best season for a picnic right now . Have you decided the place for your picnic ?  
 Person1:        We have decided to go to the park this Sunday . Would you like to go with us if you have not decided yet ?  
 Person2:What did the whetherman say ?  
 Person1:        He ’ s predicting clear skies .  
 Person2:Well , I will think it over . 

informal