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: Is there a time you would like to arrive by? Sentence2: Your search engine does not include the restaurant I've inquired about. Sentence3: The TR0117 leaves at 19:59 and arrives at 21:27. Would you like me to book it on this train? Sentence4: I am leaving cambridge to go to london liverpool street. Sentence5: Do you have the phone number of the restaurant? Also, what area of town is it in? Sentence6: Yes could I also have their address? Sentence7: The Gandhi is in the city centre, and their phone number is 01223353942. Can I help with anything else today? Sentence8: Uhm? Do you have any info about the Gandhi? I'd like the phone number, address, and area. Sentence9: That's all I needed about the train I also need some information on a restaurant called The Gandhi Sentence10: I just need one ticket. Sentence11: No preference on arrival. As long as it leaves after 18:45. Sentence12: Can you tell me where you want to depart from and want to go to? Sentence13: Sure. The address is 72 Regent Street City Centre. Is there anything else I can help you with today? Sentence14: The Gandhi is located at 72 Regent Street City Center and offers cheap Indian cuisine. Sentence15: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence16: Hi, can you help me find a train that leaves after 18:45 Monday? Sentence17: How many tickets do you need? Sentence18: That will be all, thank you very much. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User