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: No, thank you. That is all for now. Sentence2: I would like a Italian food in the centre. Sentence3: The ticket is 16.60 pounds. Sentence4: Thank you , that is all Sentence5: Can I look up anything else for you today? Sentence6: Okay great! I was able to book that and your reference number is FU7FV4QM . Sentence7: The first train out of Cambridge after 13:45, going to London Liverpool Street, is the TR9404, which leaves at 13:59. Sentence8: Ok, how much is the ticket? Sentence9: I was able to book the ticket the reference number is ZPDXC5NW . What area would you like the restaurant? Sentence10: Price doesn't matter. Can you recommend one that you love? Sentence11: I'm going to Liverpool Street in London. Sentence12: i recommend the don pasquale pizzeria. do you need a reservation? Sentence13: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence14: What is your destination? Sentence15: There are several Italian restaurants in the center. Do you want a cheap, moderate or expensive price range? Sentence16: Just to confirm, would you like me to book Train TR9494 for 1 seat? Sentence17: Yes I do, for the same day. We will need a table for 6 at 10:15 please. Sentence18: I will have to take it then. Sentence19: yes. im also looking for a place to eat Sentence20: Unfortunately, there is not from that destination. Sentence21: I need to book a train that leaves after 13:45 on Tuesday. Sentence22: I cant afford that is there anything cheaper? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System