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: Thank you for using this system. Sentence2: No, I'd just like it to be in the west. Can you pick one and provide a phone number? Sentence3: There are over 200 trains leaving from Cambridge on Friday. Do you have departure time and destination? Sentence4: Yes, I want to go to bishops stortford and leave after 20:00 please. Sentence5: Ok, the Lynne Strover Gallery is free. The phone number is 01223295264. Anything else I can help with? Sentence6: There are several museums in the west. Is there a particular type of museum you are interested in? Sentence7: Yes I am looking for a train on friday that should depart from cambridge. Sentence8: The arrival time is 22:07 and the trainID is TR4664. Sentence9: Would you like me to book this train for you? Sentence10: I was first wondering the price of that train and what time it arrived. Oh! I also forgot to ask for the postcode of the Gallery! Sentence11: TR4664 departs at 21:29. Would you like me to book that for you? Sentence12: No problem. The gallery's postcode is cb30aq and the train to Bishops Stortford is 10.10 pounds per ticket and will arrive by 22:07. Would you like to book this train? Sentence13: Thank you, this is very helpful. Sentence14: I am looking for places to go. preferably a museum in west. Sentence15: No that is not necessary. Thanks for your help, that's all I need for today. Sentence16: Yes please! Can I get the arrival time and train ID, please? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System