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: Have a good day and enjoy the museum! Sentence2: Please book two seats on that train, and send me the reference number. Sentence3: I would like to go to stansted airport on wednesday please Sentence4: That is everything I needed for now. Thank you! Sentence5: The cambridge contemporary art museum is free and located in the centre. Sentence6: What is your destination and when would you like to leave? Sentence7: I'm looking for a train departing from Cambridge. Sentence8: Awesome. I'm also looking for places to go in the centre of town. Any suggestions? Sentence9: Booked! Your reference number is 89Q51FJW . The fee is 20.2 GBP and paid at the station. Sentence10: Thanks, that's very helpful. Oh, right, what postcode is it in? Sentence11: There is a train departing from Cambridge to Stansted Airport on Wednesday at 11:40. Sentence12: We have many trains that leave after 11:00. Where would you like to go and on what day? Sentence13: The postcode for the Cambridge Contemporary Art Museum is cb21su. Is there anything else I can assist you with today? Sentence14: I'm leaving cambridge and would like to leave after 11:00. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System