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 found 4 guesthouses and 2 hotels with 3 star ratings do you have a preference? Sentence2: I'd prefer a hotel rather than a guesthouse. Sentence3: Could you give me more information the the Lensfield? Sentence4: Yes please, book it for Saturday for 3 people for 3 nights. Sentence5: I'm sorry, I was unable to reserve rooms for that day and length of stay. Would you like to try anything else? Sentence6: The lensfield hotel is an expensive 3 star hotel in the south area. Their address is 53-57 lensfield road. Would you like me to reserve a room for you? Sentence7: Have a great stay! Sentence8: I am looking for a room and want to see if I can find somewhere that has 3 stars. Can I get some help with that? Sentence9: I have successfully booked your stay at the Lensfield Hotel for two nights. 716V6QS6 is your reference number. Sentence10: Great, thank you! That is all I need today. Sentence11: There is the Gonville hotel in the centre and The Lensfield hotel in the south, both have free internet and parking. Would you like to book one of these? Sentence12: How about 2 nights? Would that work? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User