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: There are 9 Chinese restaurants that match your criteria. Is there a specific part of town you'd like to dine in? Sentence2: And where will you be traveling to and from? Sentence3: We have the Hakka and The Hotpot that match your search. Do you have a preference? Sentence4: Let's go with Hakka, and make a booking for 7 people at 19:15 on Monday. And give me the reference number please. Sentence5: From stevenage to cambridge. Sentence6: Great the booking was successful, your reference number is 4DV3FA1B . Sentence7: Hi, I want to find a Chinese place to eat that's expensive. Sentence8: I'll take the one that arrives at 7:54. How much do those tickets cost? Sentence9: It's my pleasure. Thanks for using Cambridge TownInfo! Sentence10: Thanks very much. I also need a train for Monday, arriving by 9:45. Sentence11: There are 2 trains that arrive by 9:45. One leaves at 5:54 and one leaves at 7:54. Sentence12: The ticket is 12.80. Would you like me to book this for you, or do you have other questions I can help with? Sentence13: I'd like to dine in the north if possible. Sentence14: I'll book the train myself. Thanks for your help today - I'm all set! Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System