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: It's the Cygnet Trust .
Person2:Could you spell that please ?
Person1: Of course . C , Y , G , N , E , T .
Person2:Cygnet . OK , I've got that .
A:
informal