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: No, that's all for today. Thank you! Sentence2: What is your departure day and time? Sentence3: I have no set departure time as long as my arrival time is before or at 19:00. Sentence4: Ok, there are 13 different options, if you give me a departure time, we can narrow it down from there. Sentence5: I don't need to book at the moment, thanks. All I need is the ticket price. Sentence6: Yes, may I please have the address, postcode, and phone number for the ADC Theatre? Sentence7: There are 4 theatres in the center - adc theatre, cambridge arts theatre, mumford theatre, and the cambridge corn exchange. Would you like more information on any of those? Sentence8: No I would like to go somewhere in the centre. Is there a theatre of any type? Sentence9: Great, thanks. I also need to book a train going to cambridge, and I will be departing from broxbourne. Sentence10: Thank you for using our site and let us know if you need anything else in the future. Sentence11: The ADC Theatre is in postcode cb58as and is located on Park Street. The phone number is 0122300085. Sentence12: The price of TR1828 from Broxbourne to Cambridge is 17.90. Is there anything else I can help you with? Sentence13: I am looking for places to go in Cambridge. I am looking for an attraction that has sports and located in the Centre, can you help me find it? Sentence14: TR1828 will get you in at 18:32. You leave at 17:32. May I book that for you? Sentence15: I would like to leave on Thursday and arrive by 19:00. Sentence16: Okay. Do not hesitate to call us back if you need anything else. Sentence17: It doesn't look like such a place exists. Would you like me to look outside of the city centre? Sentence18: Alright. Goodbye. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System