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: Let's do something really nice for our family this Christmas .
Person2:What did you have in mind ?
Person1: I don't know yet .
Person2:I just know I want to get out of the mindless gift trap .
Person1: I know what you mean .
Person2:I want to give a gift that is really meaningful .
Person1: Or do something that shows we have spent time thinking about them .
Person2:Or what only we are able to give them .
A:
formal