You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: How about guesthouses with 0 stars? Sentence2: A 2 star would be good. I don't care about price range. Sentence3: No, I'll try the Galleria. Can you book a table there for 2 at 15:30 on Tuesday, and please provide me with the reference number? Sentence4: Yes. Please book for Tuesday for 2 people, 2 nights. Sentence5: Yes I would like european food. Sentence6: I'm looking for a restaurant in the centre area in the moderate price range. Sentence7: I have the El Shaddai guesthouse. It is cheap and in the centre of town. It has free parking and internet. Would you like me to book you a room? Sentence8: There are 2 to choose from. They are both good, but I like the Galleria personally. There are also a few that serve modern european food. Sentence9: Booking was successful. The table will be reserved for 15 minutes. Reference number is : T7QJ1WB2 . Anything else you need? Sentence10: There are 21 places to dine at with moderate pricing, do you have a preference for cuisine type? Sentence11: I have 2 guesthouse and 2 hotels in the centre. Do you have a preference or a price range in mind today? Sentence12: Yes. I am also looking for a place to stay that's in the same area as the restaurant with free parking. Sentence13: How about 1 day stay? Sentence14: I'm sorry, we don't have any 2 star hotels or guest houses in that area. Would you like to try something else? Sentence15: Okay, have a great day! Sentence16: Booking completed. A red Toyota will pick you up and take you to the restaurant. Contact number for them is 07965351585. Anything else I can help you with? Sentence17: I apologize but I was unable to book the el shaddai for that day and stay duration. Would you be willing to book starting another day or shortening your stay? Sentence18: No, that'll be all. Thanks a lot for all your help. Bye! Sentence19: I also need a taxi to go between the two places. Sentence20: Your 1 day booking was successful. Your reference number is IHD90OCU . Can I help you with anything else? Question: Who has spoken the sentence 16? (A) User (B) System
A:
Answer: (A) User