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: You're hotel reservations have been made. Your reference number is HKBN4ZXY . Is there anything else I can assist you with? Sentence2: The TR2929 can get you there by 12:07, it departs at 11:29, can I book you for tickets? Sentence3: Thank you that was all I needed. Sentence4: Thank you. I also need information on the Gonville Hotel. Can you look at that for me? Sentence5: The hotel will also be for 5 people starting sunday Sentence6: Okay, the booking was successful. The total cost is 50.5 GBP and it can be paid at the station. The reference number is OOGHNZGW . Sentence7: Yes, of course. What would you like to know? Sentence8: I need to take a train to Bishops Stortford on Thursday. Sentence9: Thank you for using the Cambridge TownInfo centre! Sentence10: Ok, I am getting the info up now, how many people, and what will be the first night? Sentence11: Yes I would like a booking for 5 people. Sentence12: I can definitely help you with that. Do you have a particular time of day you want to depart? Sentence13: My schedule is somewhat flexible but I need to arrive by 14:00. Sentence14: i need to book that hotel for four nights. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System