You will be given a definition of a task first, then some input of the task.
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'.

Person1: Hello , John , please invite all our clients to the conference next week .
Person2:How should I get their contact info .
Person1: Get the clients ' contact info from my Rolodex .
Person2:Where should I put them up ?
Person1: How about the Holiday Inn ?
Person2:The clients like the Shangri-La Hotel more .
Person1: Well , the client is always right .
Person2:What else would I prepare , Sir ?
Person1: Please print out the meeting agenda for me to look over .
Person2:Certainly .
Person1: And make sure to return my Rolodex to my desk when you are done with it .
Person2:Of course . I'm on it
Output:
formal