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: Which day do you require the train? Sentence2: Unfortunately the booking was unsuccessful for the hotel Sentence3: No, that's it. Thanks! Sentence4: Ashley hotel is in the north in the moderate price range with a 2 star rating. Free parking and wifi also. Does this suit you to book your stay? Sentence5: Unfortunately there are no hotels available that fit that criteria. Sentence6: Alright, thank you and goodbye! Sentence7: Yes, what is the reference number? I also need a train that departs from Cambridge by 12:30 can you assist with that? Sentence8: Does it have free wifi? Is it in the north? Sentence9: What can you recommend? And please I need free wifi. Sentence10: Wednesday. I will need 1 ticket. Sentence11: I have booked Train TR9635 departing at 10:36 and arriving at 11:55. Reference# UN7QY0L4 . Will you be needing anything else today? Sentence12: Can you help me find a place to stay? I am looking for an expensive hotel, but it doesn't need free parking. Sentence13: There are 5 expensive hotels with free parking. I recommend The Gonville Hotel which has a 3 star rating. Sentence14: It does have free wifi, but it is located in the centre, there are no expensive hotels in the north area. Sentence15: Would you prefer a hotel or a guesthouse? Sentence16: Ok you are booked for 2 nights starting on Monday at the Ashley (Ref# MIFN5IXJ). What else can I help you with? Sentence17: Check for one in the moderate price range with that criteria. Book something for 1 person for 4 nights starting on monday. Sentence18: Yes I also need to find a train out of Cambridge that arrives by 12:30 in norwich. Sentence19: I am looking for a hotel please. Sentence20: Will you please try to book the hotel for 2 nights starting from Monday? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System