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:       Hi , Paulo . How are things going ?  
 Person2:Everything's going very well . The first phase of the project was finished three days ahead of schedule . We're on target to complete phase two by the beginning of week 40 .  
 Person1:        That's good news . What stage are you at now ?  
 Person2:Well , we've just finished laying the cabling and we're waiting for the safety inspector to give us the go-ahead to continue . I'm just going to meet him . Do you want to come ? 

formal