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: Well, I need to know the arrival time first. Sentence2: Yeah, that works. Can you recommend a 0 star hotel for me? Sentence3: it doesn't really matter. Moderately priced located in the centre. I need phone number, hotel type and if they have free parking or not Sentence4: I would like to leave after 11:15. Sentence5: I'd like it to be in the centre please. Sentence6: You're welcome, have a great day! Sentence7: I'm hoping to book a train from bishops stortford to cambridge. Please list all times for that route. Sentence8: Arrival time is 12:07 does that work for you? Sentence9: The TR0516 leaves Cambridge at 11:29 on Wednesday. Will that work for you? Sentence10: Yes I have two guesthouses and 1 hotel in that category do you have a preferred area? Sentence11: I need to leave Wednesday and arrive after 11:15. Sentence12: i suggest cityroomz. its a hotel in the moderate price range. their phone number is 01223327978 Sentence13: Great, thank you. That is all that I need. Sentence14: Unfortunately there are no trains meeting your criteria. Would you like me to look up another departure and arrival time? Sentence15: There's a total of 70 trains. Is there a particular time of day you would like to travel? Sentence16: Thanks for that information. What time you would like to leave? Sentence17: Does it have free parking? Sentence18: In the town centre there is one guesthouse and one hotel with 0 stars. Would you like the hotel or the guesthouse? Sentence19: Yes, they do have free parking at this hotel. Sentence20: no, i want that day and time please Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User