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: How about one that serves European food? Sentence2: No but can I get the phone number, postcode, and address please? Sentence3: No I am truly sorry. Something else perhaps? Sentence4: Great. Thank you! Sentence5: Are there any crossover restaurants in the west? Sentence6: Sorry, that would be 16:07 for arrival time. Can you confirm how many are traveling? Sentence7: Yes I would like a train to bishops stortford please. Sentence8: Yes, departing from Cambridge on Monday. I'd like to get to Bishops Stortford by 18:00, if possible. Sentence9: Thank you for using Cambridge TownInfo centre. Please consider us for your future travel needs. Sentence10: Yes please. Book that. Sentence11: There are no crossover restaurants in the west is there another area you'd like me to look in? Sentence12: I take that back, the TR4283 definitely arrives at 06:07, and departs at 05:29. The booking was successful. The total will be 10.1 GBP, payable at the station. Reference number:2P9BM67Z . Sentence13: Cambridge Lodge Restaurant is a European place in the west that is expensive. Would you like to book a table? Sentence14: I can help you with that. Just to confirm, are you departing from Cambridge or another city? Sentence15: Absolutely. They are located at Cambridge Lodge Hotel 139 Huntingdon Road, City Centre. Their phone number is 01223355166. Their postcode is cb30dq. Anything else I can help with? Sentence16: How about looking for crossover restaurants that are expensive. Doesn't matter the area. Sentence17: I am traveling by myself. I need the train ID also after you book. Sentence18: Train TR4283 arrives at Bishops Stortford by 6:07 and costs 10.10 pounds per ticket. Would you like me to reserve a seat for you? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User