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: Yes, that works great. Could you book 2 tickets for me please? Sentence2: I'd like to arrive by 08:00, and I'd like to travel on the same day that I'm going to the Noodle Bar. Sentence3: Booking is successful, you will need to pay 15.68 at the station, your reference number is 9NJNSEIC ., anything else that I can help with? Sentence4: Booking was successful. The table will be reserved for 15 minutes. Reference number is : EYEGC64E . Dojo Noodle Bar. Is there anything else? Sentence5: No thank you. That will be it. Sentence6: I need a train from kings lynn to cambridge, if possible. Sentence7: I have train TR5198 departing at 07:11 and arriving at 07:58. Would that work for you? Sentence8: I'm looking for a cheap restaurant in the centre. Sentence9: I don't really have a preference. I just need something for Sunday at 18:00. There will be 2 of us. Sentence10: Thank you, enjoy the rest of your day Sentence11: There are several options to choose from in the centre in the cheap price range. What kind of food are you in the mood for? Sentence12: There are 133 trains available. Tell me more about your trip. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User