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 can do the j restaurant in the centre if that would be ok Sentence2: Okay, the river bar steakhouse and grill can be booked at 9:00 on Sunday, I've booked for 5 people, the reference number is RFTEXMIX, is there anything else I can help with today? Sentence3: They are not open at 9:00 on sunday. May I suggest another establishment? Sentence4: Unfortunately booking at that time was unsuccessful, do you have an alternate time you'd prefer? Sentence5: Sure we can try to book that. Sentence6: I am sorry but on Sunday cheap restaurants in the centre are all completely booked. Is there something else I can help you with? Sentence7: Sounds great, I'd like to book for the same number of people at 10:00 on the same day. Sentence8: I need to leave after 18:45, not the time I said before. Sentence9: Centre area, no food type preference, what do you recommend? Sentence10: Please try 9:00 instead on the same day. Sentence11: Yes, I am also looking for a cheap place to dine. Sentence12: I am certain. Their phone number is 01223363471, perhaps you can call and speak with someone. Sentence13: I have five options for your requested time with the closest leaving at 19:21. Would you like to make a reservation? Sentence14: Please recommend the cheapest restaurant that is available and book it. We need to eat! Thanks!!! Sentence15: No, thank you. You were very helpful. Sentence16: That doesn't seem to be working either. Sentence17: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence18: You're welcome. Is there anything else needed? Sentence19: Are you quite certain you can't get me a table at 9:00? Sentence20: I've got several choices for cheap dining. Do you have a preference of area or food type? Sentence21: I have several options. How about the Dojo noodle bar? It's located at 40210 Millers Yard City Centre. Sentence22: Actually, book that for me. Same number of people on the same day. Sentence23: thank you I will call them Sentence24: Can you please locate another restaurant for me please that is accepting reservations on sunday. Sentence25: I am looking to book a train. Sentence26: I would be more than happy to help you find a train. Can you tell me where you will be departing from and where you would like to go? Sentence27: Yes please. Book it for 5 people. What is the reference number? Sentence28: It appears to be booked up all day sunday. Can I recommend another restaurant that might be open that day? Sentence29: I'm looking for a train that goes to leicester and arrives on sunday. The train needs to leave after 6:45 from cambridge. Sentence30: Your reference number is P5XAHU9D . Is there anything else I can help you with? Sentence31: Yes please do I am having no luck, I need the reference number then too. Sentence32: Is there a time you need to arrive by? Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User