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'.
Q: Person1: Chris , where are you going ?
Person2:I'm going to the store .
Person1: Really ? I need to go to the store too .
Person2:Would you like to come with me ?
Person1: Yeah , let's go together .
Person2:Would you like to go now or later ?
Person1: Now .
Person2:What ?
Person1: Now would be better .
Person2:OK , let's go .
Person1: Should we walk ?
Person2:No , it's too far . Let's drive .
A:
formal