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: Booking was successful, the total fee is 116.2 GBP payable at the station. Reference number is : M0H2YQDY . Is there anything else I can do for you? Sentence2: Try for a 4 star instead. Sentence3: I don't have to leave at exactly 15:15. I just need to leave after that time and travel to Cambridge. What are my choices? Sentence4: Thanks! And if you think of anything more that you need, feel free to contact us again! Sentence5: That is all I will need. Sentence6: Have a great day and stay! Sentence7: Will I be able to get a train out of London Liverpool Street that leaves after 15:15, or will I need to use a different station? Sentence8: Okay, great. Thanks for your help! Sentence9: I need to be there on Friday. Sentence10: There is no train leaving at 15:15. However there is leaving at 15:39 on Friday, would you like that one? Sentence11: I am also looking for a place to stay. With free parking and one star. Sentence12: Do you need anything else today? Sentence13: Good day to you too, goodbye Sentence14: I'm afraid that I didn't find any. Would you like to try for a different star rating? Sentence15: Booking was successful. Reference number is : T4EBBLA6 . Sentence16: Okay can you make a booking for 4 nights from Friday for 7 people. Sentence17: I would like to book it for Friday for 7 people and will need a reference number. Sentence18: Sure thing I would suggest this one arbury lodge guesthouse. Sentence19: There is a train at 15:39 and every other hour after that. Sentence20: What day would you like to leave? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System