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: Is there any train to stevenage that leaves after 15:45? Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 2Q3DVUFC . Anything else I can do for you? Sentence3: TR4216 leaves at 17:21. Does that work for you? Sentence4: riverside brasserie serves modern european food. Would you like me to book seats? Sentence5: yes, please. 8 people at 12:00 on saturday. Sentence6: No that's all for today, thank you. Sentence7: What day would you like the train for? Sentence8: I will be travelling from Cambridge on Saturday, Sentence9: The train will arrive by 18:10 Sentence10: I'd like a modern european restaurant. Sentence11: What time will it arrive? Sentence12: Thank you for calling. If you need additional assistance, please feel free to call again. Have a great time in Cambridge! Goodbye. Sentence13: Thanks! I'm also looking for a place to eat in the centre if you don't mind. Sentence14: There are lots to choose from. First, may I ask if you have a certain type of cuisine you are looking for? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System