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: That sounds great. Thank you so much for your help. Sentence2: i need to leave after 12:45 on Monday Sentence3: I'd be happy to help with your request, first I will need to know what day/time you'd like the reservation for. Sentence4: That will be all. Thank you for your help. Goodbye. Sentence5: How about TR6110 that leaves at 13:00 Sentence6: You're welcome, have a great day! Sentence7: Reference number is : VQFAZJU3 . What else may I help with? Sentence8: It is a chinese restaurant in the north part of town located at 66 Chesterton Road Chesterton Sentence9: Hello, I am looking for a train to leave on Monday after 12:45. Sentence10: Thanks! For 17:45 on Monday, please. Sentence11: Yes, can you tell me about the Hotpot Restaurant? Sentence12: TR6110 has a total travel time of 51 minutes. Can I help you with anything else today? Sentence13: I don't need anything to be booked but I do need the train ID and the travel time. Sentence14: Can we narrow it down by choosing where you want to depart and arrive? Sentence15: How many people should I book for? Sentence16: Can you please book me a table at the restaurant for 2 people? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User