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'.

Example Input: Person1: Have you any tour route to Budapest ?
Person2:Yes , I have , sir . How long are you going on vacation ?
Person1: About 2 weeks .
Person2:I recommend you this route . We call it golden routes for the sightseeing spots .
Person1: Well , will you offer me any reduction since it's a out-of-season tour ?
Person2:Of course , we will , sir .
Example Output: formal

Example Input: Person1: Lisa , I'm home .
Person2:How was your day ?
Person1: Pretty good . I've made a few friends already .
Person2:Anybody I know ?
Person1: Well , Pam Franklin lives next door to us . By the way , can I go to her house this Saturday ?
Person2:Of course . You didn't have to ask me .
Person1: That's what Pam said .
Person2:Just don't stay out too late .
Example Output: formal

Example Input: Person1: If one is rich , is the happy ?
Person2:I don't think so.It ' s impossible to equate wealth and happiness .
Person1: Could I understand what you said as the poorest is the happiest ?
Person2:Of course not.Sometimes a poor man can be extremely miserable .
Example Output:
formal