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 . What can I do for you ? 
 Person2:Good morning . Would you like to tell me something about the computer ? I've never seen this brand before . What is your superior brand ? 
 Person1:        This is our new brand . I can make sure our computer board is one of the best boards . 
 Person2:Can you tell me the specialty of your computer board ? 
 Person1:        With pleasure . It's easy to have a memory expansion on board capacity and fulfill your needs for a computer . Besides , there is more space for extra cards to expand later on . 
 Person2:What's the memory capacity of the computer ? 
 Person1:        The hard drive has 260 G and the RAM is 4 G . 
 Person2:Can you give me a wholesale list ? 
 Person1:        Yes . The price differs depending on how many you want . 
 Person2:Is the price negotiable ? 
 Person1:        Yes . It depends . If you have a large order , we will give you a discount . 

formal