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: It is. How many people will there be and what time would you like on Wednesday? Sentence2: Okay I booked you into the J Restaurant that also serves Asian food in the cheap price range and your reference number is 7MUMBMFD . Sentence3: Is dojo noodle bar in the centre of town? I need something in that area, please. Sentence4: The booking was unsuccessful. Would like to book it at another time? Sentence5: The reservation needs to be for 2 for 17:00 on Wednesday evening. Do they have a table then? Sentence6: I need a cheap place to dine please. Sentence7: I don't care about the type of food. I need a reservation for Wednesday night. Sentence8: Thanks so much. That's all I needed. Sentence9: I can book you for dojo noodle bar, how many should I book for and what is the preferred time? Sentence10: No. It needs to be t 17:00. Another restaurant in the same area and price range would work. Sentence11: We have 22 inexpensive restaurants. What sort of cuisine would you like? Sentence12: You're welcome. Enjoy your day. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System