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 , Lily .
Person2:Hello , Mr . Clark . You ' re early for lunch . It ' s only eleven o ' clock .
Person1: When I come late , there ' s usually nothing left .
Person2:What would you like today ?
Person1: I ' ll have the leg of lamb .
Person2:And would you like salad ? The salad plate today is lettuce , tomatoes , and black olives .
formal

Person1: Excuse me . What time does the next train to London leave ?
Person2:At 10:30 .
Person1: Is it a direct train to London ?
Person2:Yes , it is .
Person1: OK . Two tickets to London , please .
Person2:Single or return ?
Person1: Single , please . How much in total ?
Person2:10 pounds .
Person1: Here you are . Which platform should I go to wait for the train ?
Person2:It's platform 5 .
Person1: OK . Thank you .
Person2:You are welcome .
informal

Person1: Where did you work in the past ?
Person2:For the past 5 years , I have been in an Ericsson ( China ) Communication Co , Ltd .
Person1: What's your title in the company ?
Person2:My title was Project Manager . There were almost 100 people under my supervision .
formal