Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: Certainly. Queen's College is located on Silver Street, postcode cb39et. That phone number is 01223335511. Sentence2: They are mostly expensive and there is one that is moderately priced. Sentence3: Great that was all I needed today. Sentence4: Happy to be of service, and thanks for using the Cambridge TownInfo centre today! Sentence5: Can you book the moderate priced one for 4 people at 12:45 on monday? Sentence6: Sure, what area of town are you looking to visit? Sentence7: Is it moderately priced? Sentence8: Can you try an indian place instead? And something in the west. Sentence9: I have booked you a table at Meghna for Monday at 12:45 for 4 people. Your reference number is B2RNYUEG . Sentence10: I am also hungry Sentence11: I can help you with finding a restaurant. Do you have particular one in mind? Sentence12: Definitely the west. I'll need a phone number, address and postcode, please? Sentence13: There are six restaurants. would you like rice boat ? Sentence14: I was hoping to find a college to visit while in cambridge. Sentence15: Yes, I'd like to try some Polynesian food. Sentence16: I'm sorry there are no polynesian restaurants. Would you like a different type of food? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User