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 need to get to Ely by 17:30. Sentence2: Perfect! It is called Da vinci pizzeria and is located at 20 Milton Road Chesterton Sentence3: I'm glad to have been of service to you. Is there anything else I can assist you with? Sentence4: Sounds great. Book me there for 12:45 on sunday for 5 people. Sentence5: Can you help me find a very cheap restaurant in the north? Sentence6: Have a wonderful day! Sentence7: I have made your reservation for 5 people on sunday at 12:45 at da vinci pizzeria and your reference number is KC6B0PKU . Sentence8: What other options are there for Italian food? Maybe I could go for a moderate price or. Sentence9: Thank you for contacting Cambridge TownInfo Centre. Have a great day! Sentence10: I suppose since they don't do Sunday reservation, switch to Saturday. Sentence11: No. Thanks for all of your help though. Sentence12: Alright, there are quite a few. When would you like to leave? Sentence13: Can you find me a cheap Italian restaurant in the north part of town any one is fine and book it for 5 people at 12:45 on sunday? Sentence14: 16.50 pounds, should i book it for you? Sentence15: No, thanks, I'll just take care of it at the station. You've been a big help. Sentence16: I'm also looking for a train that departs from cambridge and is leaving on monday. Sentence17: Lets go with the italian restaurant! Sentence18: Train TR9310 will get you there by 17:24 and is your best option. Would you like me to book it for you? Sentence19: Thank you for contacting us. Sentence20: All I have in that price range is chinese,and indian. Sentence21: What is the price for TR9310? Sentence22: I have two restaurants that would meet your requirements. I have an indian restaurant or an italian restaurant. Which do you prefer? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User