You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

[EX Q]: Sentence1: Galleria serves European food and is in the centre part of town and has a moderate price range. Sentence2: No restaurants serving australasian food can be found. May I find another type restaurant for you? Sentence3: Looking for someone that serves Australasian food? Sentence4: How about European food? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: How about TR9382? Sentence2: I would like to leave on Sunday. Sentence3: I think that'll work. I need to reserve two seats, can you help me with that? Sentence4: Booking was successful, the total fee is 7.04 GBP payable at the station. Reference number is : 6NJA0V8R . Sentence5: You're very welcome. Have a great day. Sentence6: Well I need to leave after 14:45, so if it is after that time that'll work. Sentence7: Thank you. That's all I need for now! Sentence8: Hi. I'm looking for a train from ely to cambridge, if there is one. Sentence9: TR9823 will leave at 15:35, how does that sound? Sentence10: Okay, what day do you want to leave? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Thanks, that's all. Good bye. Sentence2: No thank you. Sentence3: You can reach Addenbrookes Hospital at phone number 01223245151, and they are located at Hills Rd, Cambridge, postcode CB20QQ. Do you need further assistance? Sentence4: I need medical treatment. Sentence5: You are welcome. Enjoy your day. Sentence6: Thank you is there anything else Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User