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: Alexander B and B is one of our higher rated guesthouses in the centre of town. It is 4 stars, but is surprisingly cheap. Can I get you any specific information? Sentence2: I need to know more about the Alexander bed and breakfast. Sentence3: I would like to make a booking for book it for 5 people and 3 nights starting from wednesday. Sentence4: It's an expensive Indian restaurant in the west part of town at 31 Newnham Road Newnham. Their phone number is 01223461661. Your reference number is 1ETONEKW . Sentence5: Thank you that is all I need today. Sentence6: Great. Thanks for all your help! Sentence7: Yeah, anytime let us know if you need anything else. Sentence8: I need information on India House, a restaurant. I need to book for 5 people at 16:45 for Wednesday, please. Sentence9: Happy to be of service. Enjoy your meal and your time in Cambridge! Sentence10: Yes, I can book it now. Sentence11: Hi, I'm the supervisor, I have taken over for the rep, my apologies, you booking is set, the reference number is VY2TZJWT . Can I help with anything else? Sentence12: Is there a reference number associated with the booking? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User