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: It doesn't really matter, but I need to be there by 9:30. So, the closest I can get to that will be good. Sentence2: What day would you be traveling on? Sentence3: Ok great. The TR1242 will fit your needs. How many tickets would you like to book? Sentence4: It's a 38 minute ride and it will cost 10.10. Sentence5: Your welcome. It has been a pleasure assisting you today. Goodbye Sentence6: There a good number of cheap restaurants in town. Are you looking for a particular type of food? Sentence7: that is all i wanted for today. thanks Sentence8: I will be traveling on Thursday, the same as the restaurant reservation. Sentence9: I have reserved your table. Your reference # is GDP785RS . Is there anything else I can help you with? Sentence10: No, I just want to try something new. Could you suggest a couple of less common cuisines? Sentence11: At 14:00 please Sentence12: Sure, I just need to know what time you would like to dine. Sentence13: Yes, I also need a train departing from bishops stortford going to cambridge. Sentence14: I'm looking for a cheap place to eat. Sentence15: yes, reserve a table for two on thursday Sentence16: There's a train leaving every two hours on Thursday, what time would you like to depart? Sentence17: No thank you, but could you let me know the length of travel and the price of the train tickets? Sentence18: I would recommend the gardenia, a mediterranean restaurant located in the centre of town at 2 Rose Crescent City Centre. Would you be interested in reserving a table? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System