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: the train id is TR0335. Booking was successful, the total fee is 189 GBP payable at the station . Reference number is : 13V7H457 . Sentence2: Pizza Express is a great place that serves moderately priced Italian in the city centre. Would you like me to make you a reservation? Sentence3: Perhaps the center? But I don;t think I have a preference. Sentence4: Thanks that's all I need today Sentence5: No. How about Italian food? Sentence6: I was able to book for you. Do you need a reference number? Sentence7: What day do you need to leave? Sentence8: Sure. There are five moderately priced italian restaurants. Would you prefer a certain part of town? Sentence9: There are 5 different trains on that day. Would you like me to book one of them? Sentence10: Yes please. I just need tickets for all 5 of us. as close to 18:30 as possible. Sentence11: Can you help me find a moderately priced restaurant that serves North American food? Thanks. Sentence12: Thank you for contacting us and have a great day. Sentence13: Yes, I do need it. I'm also looking for a train that goes to Leicester after 18:30. Is there anything available? Sentence14: Yes. Please reserve for 5 people on Sunday at 15:00. Sentence15: I need to leave on monday and depart from cambridge. Sentence16: Unfortunately, I am unable to locate a moderately priced North American restaurant. I did find an expensive one, would you be interested in that? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User