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: Great! Can I get the phone number? Sentence2: Thanks so much for the train booking. I also need lodging with free wifi. I don't need free parking, though. Sentence3: Either one is fine. If you can recommend for me, that would be great. Oh and if there's one you like that's moderately priced, that would be fine too. Sentence4: Okay, the booking was successful and the total fee is 56.56 GBP payable at the station. The reference number is D2K69PNC . Sentence5: No that won't be necessary. I'd just like the postcode and address please. Sentence6: Their phone number is 01223353071. Would you like me to reserve a room for you? Sentence7: Stansted Airport, please. Sentence8: I have three, is there a star range you prefer? Sentence9: That's all for me. Thanks for your help. Bye! Sentence10: I have a few places available, in which area would you like to stay? Sentence11: I would suggest Avalon. Sentence12: Have a nice day! Sentence13: TR9445 departs at 11:24 and arrives by 11:52. Would you like a ticket? Sentence14: Do have anything expensive? I don't care what area. Sentence15: I want a train going to cambridge. Sentence16: Yes, please. I need a booking for 7 people. Sentence17: They are at 62 gilbert road postal cb43pd, may I assist with anything else? Sentence18: Oh, I don't really care about that. Which place would you recommend? Sentence19: I need to leave on sunday and I need to arrive by 12:15. Sentence20: OK, and what day and time are you traveling? Sentence21: Would you like a hotel or a guesthouse? Sentence22: You're in luck, I have quite a few trains coming into Cambridge! Where will you be departing from? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System