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: TR4076 departs from bishops stortford going to cambridge on Friday. It leaves at 1:29pm and arrives at 2:07pm. Would you like me to book this train for you? Sentence2: That is all I needed today and I thank you for your help. Sentence3: I need to know the day and how many people will be staying, please? Sentence4: I show 4 locations available. What price range are you looking for? Sentence5: See where that train will be coming from. I mean where will you be leaving from? Sentence6: I am looking for something in a moderate price range. Sentence7: That sounds perfect! Please book it for me. Thank you! Sentence8: I would like to know more about the Aylesbray Lodge, do you have the address and can you tell me whether they offer free parking? Sentence9: I need to go to cambridge from bishops stortford Sentence10: How about you try to search for a type of the guest house without certain dates? Sentence11: You are welcome. Goodbye! Sentence12: I need a place to stay in the south. Sentence13: They do indeed have parking and their location is 4 mowbray road. I can book this for you if you'd like, I just need to know details about your stay. Sentence14: There are the two guesthouses that were mentioned previously, if you would like to see if there are other options, you will need to broaden your search requirements. Sentence15: There are 5 trains going to Cambridge from Bishops Stortford on Friday. Do you have a preference in time? Sentence16: That's all the info I need about the guesthouse, but I also need to book a train leaving on Friday. Sentence17: Yes, I need tickets for 4 people, and can you give me a reference number? Sentence18: We have it booked for 4 tickets. Your reference number is B5DD4PQW . The total fee is 40.40 GBP. Sentence19: I just need to get there by 2:30 PM is all. Sentence20: I have found 2 guesthouses in the south in the moderate price range. The aylesbray lodge guest house has a 4 star rating. Would you like to book? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User