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: Sure, Gonville Hotel is a 3 star rating hotel located at Gonville Place. It offers free parking and free wifi. Would you like me to reserve a room? Sentence2: sure, where are you departing from? Sentence3: Unfortunately, I don't happen to have any places that are expensive in the north. Can I look for something else for you? Sentence4: TR1828 is leaving at 17:32, would you like to do that? Sentence5: Yes please. I need reservations for two people. Sentence6: Done! Your reference number is V43NQGH7 . Can I help you with anything else? Sentence7: Booking was successful, the total fee is 35.79 GBP payable at the station. Reference number is : 8BR3OQ5V . What else can I assist you with today? Sentence8: I'm sorry, but the north does not have anything to meet your needs. There are, however, 2 options that meet your needs in the centre. One 3 and one 4 star. Sentence9: Could you please double check to make sure? if that's really the case then try the center Sentence10: Yes, for 4 nights from Thursday, and 2 people. Sentence11: Departing from Broxbourne and leaving after 17:00. Sentence12: Thanks. I am also looking for an expensive place to stay in the north part of town. Sentence13: Can you help me find a train leaving on thursday going to cambridge? Sentence14: Can I get more info on the 3 star one? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System