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: No, I seem to have all the information I need today. Sentence2: TR3769 departs at 13:40 with a total travel time of 28 minutes. Do you need further assistance with anything else? Sentence3: Absolutely! Where will the departure and destination points be? Sentence4: I would like to leave Cambridge on Monday after 13:15 Sentence5: These trains leave from Cambridge 40 minutes after the hour every hour, starting at 13:40 and running to 23:40. Would you like me to book a ticket? Sentence6: I do not need to book the hotel yet. Can you please give me the phone number and hotel type? Also, do they have internet? Sentence7: Sure, we have the lensfield hotel, it's a 3 star expensive hotel in the south with free parking. Would you like to book it? Sentence8: The phone number is 01223355017. It is a hotel type, and yes there is free internet. Anything else? Sentence9: There are many trains that fit your criteria. Could you please tell me what day and time you would like to depart? Sentence10: I also need a place to stay in the expensive range that includes free parking, in the south with a star of 3. Sentence11: I will be departing from Cambridge and my destination is the Stansted airport. Sentence12: No thank you. I will just need the train ID and travel time of the first one leaving after 13:15 going to the airport. Sentence13: Great. If you need tickets, don't hesitate to contact me again. Have a great day. Good bye. Sentence14: I am looking on information regarding train tickets. Can you help? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System