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: Yes, I need tickets for 3 people please. Sentence2: Any area is fine. Please just recommend a restaurant, and send me the address and postcode. Thanks in advance! Sentence3: Your booking was successful, the total fee is 53.7 GBP payable at the station . Reference number is : 23926N66 . Let me know if I can do anything else for you. Sentence4: I found multiple Indian restaurants in the expensive price range. There are many choices in the Centre, which part of town do you prefer? Sentence5: Only the best will do. Can you find me something in the expensive price range? Sentence6: I hope you have a great time. Sentence7: thanks again for everything. Sentence8: Of course. What time and from where are you departing? Sentence9: Rajmahal is very popular. Their address is 7 Barnwell Road Fen Ditton and their post code is cb58rg. Will that be all today? Sentence10: which side of town do you prefer? Sentence11: that is it for today. have a good day Sentence12: Train TR6989 leaves at 10:32 and arrives by 11:32. Would you like to book it? Sentence13: You are quite welcome. Thank you for using our services. Sentence14: I need to catch a train into Cambridge. Could you help me find one? Sentence15: I also need a place to eat serving indian food Sentence16: I need to go to cambridge from broxbourne and the train should leave after 10:00 on a tuesday. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System