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: How about Archway House in the north? It has free parking and free Internet. It gets 4 stars. Would you like to book this one? Sentence2: The closest I have to that is a train arriving at 15:06 and takes 105 minutes to arrive. The train ID for this journey is TR1160. Would you like a reservation? Sentence3: Yes please. Book it for 4 nights for 6 people. We'd love to check in on Sunday Sentence4: I'm trying to narrow 11 choices down. Would you want free parking or free internet? Sentence5: free parking, please. Sentence6: Thank you. That was all I needed. Goodbye. Sentence7: You have several choices. Trains leave Cambridge at 5:21, 6:21, 7:21, 8:21, and 9:21. The 9:21 arrives at 11:06. Shall I book one of these ? Sentence8: Leaving from Cambridge this coming Thursday. Sentence9: Great. Your booking was successful and your reference number is PA8I7W04 . Sentence10: Hi, I need to locate a train to Leicester that will arrive by 16:45. Sentence11: No, I don't need a reservation. Sentence12: Okay we can do that. Where are you departing from? Sentence13: Yes, I was also looking for a place to stay somewhere in the north. Sentence14: Is there anything that I may help you with today? Sentence15: OK I need one that arrives at 15:45 and I will need the travel time and the train ID. Sentence16: In the moderate price range, please. Sentence17: sure, what price range? Sentence18: Have a nice day. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User