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 a copy of our service contract with Telecoms ? I'm not happy with their response time and I'd like to check the terms and conditions of the contract .  
 Person2:Sure . I've got a copy here . It's due for renewal at the end of next month . We've still got time to look for another supplier if you're not happy . 

formal