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: I would like to get there by 21:30. Sentence2: There are several trains going to stevenage on Monday, do you have a time preference? Sentence3: Okay, we have train's leaving at 05:21 and every hour after for seven hours. Would you like to book one? Sentence4: it was my pleasure to help. goodbye. Sentence5: I also need a train. Leaving Cambridge on Monday. Sentence6: Your tickets are booked for train TR9082. The total fee is 25.6 GBP. Your reference number is WSUH42EM . Is there anything else? Sentence7: I have a taste for something British. Sentence8: There's Graffiti and Travellers Rest. Which one of the two restaurants do you like? Sentence9: OK, where are you headed and at what time of day? Sentence10: Ok, there are three options in that area. Do you have a certain price range? Sentence11: i want to go to stevenage Sentence12: Travellers Rest sounds good please make a booking for 2 people at 17:00 on sunday. Sentence13: Your table for 2 has been reserved at Travellers Rest and your reference number is BSEJZQE6 . They'll hold the table for 15 minutes past 17:00. Need anything else today? Sentence14: Just book one that will get me to Stevenage by 21:30 please. 2 Tickets, just like dinner. Sentence15: I want a place to eat in the west. Sentence16: I want the most expensive one. Sentence17: Do you have a particular type of food in mind? Sentence18: Thank you for the booking and reference number. I'll let you know if I need anything else. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System