Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: No, thank you. That will be all. Have a great day! Sentence2: holy trinity church, phone number is 01223355397, postcode is cb23nz. Is there anything else you need? Sentence3: Just give me the information for the first one that is free in the centre, like their phone number and postcode please. Sentence4: My pleasure to be of service. Have a wonderful visit to Cambridge. Goodbye. Sentence5: Hi, I'm looking for a place to go see architecture in the centre of town. Sentence6: No particular pricerange, but I want it to be a type of hotel. It doesn't need to include internet. Sentence7: There are 4 churches and an old schools. All are free except for great saint mary's church which has an entrance fee of 2 pounds. Which do you prefer? Sentence8: I think citycroomz would work well. Would you like more information? Sentence9: I actually would like to find a place to stay that is in the centre of town also. Sentence10: We have 5 potential options available to you. Is there a particular lodging type or price range you are interested in the most? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User