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: I was unable to find a 1 star guesthouse with free parking. Would you like to up the stars? Sentence2: You're welcome. Enjoy your day. Sentence3: That's OK, I'll do it later. Can you tell me if there are any trains departing Cambridge on Tuesday? Sentence4: It's a 79 minute trip, and the fare is 17.60 pounds. Is there anything else I can help you with? Sentence5: How about the Archway House which is a guesthouse in the north and their phone number is 01223575314. I can book it for you if you would like. Sentence6: Hi. I need to book a guesthouse that has free parking, can you help me? Sentence7: There are 21 guesthouses which offer free parking. Which area do you prefer to stay in? Sentence8: Yes there are many trains leaving on Tuesday from Cambridge. What is your destination and the time you would like to arrive? Sentence9: That is fine. Can I have the phone number and the area that the guesthouse is in? Sentence10: It should leave after 9:15 and go to Norwich. Sentence11: Thank you, that is all the information I need currently. Sentence12: The first available train after your preferred time is TR9942 with a departure time of 09:36 and an arrival time of 10:55. Would you like a ticket for this one? Sentence13: Not right now but can I get the travel time on that? Sentence14: I am open to any area, but the hotel should definitely have only 1 star. Sentence15: How about 4 stars? Sentence16: I found quite a few that meet that criteria. How about the archway house? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System