Domains: Travel_15, Hotels_25, Flights_45

user: Find me an attractive child friendly place without an entry fee

system: Do you prefer any place

user: Look around Berlin

system: How about Berggruen Museum which is a museum

user: That's perfect. Now find me a house to stay with rating 3.9 or higher

system: How about house at Alt-Moabit 99, 10559 which has 3.9 rating

user: That's great

system: Do you want to make a reservation

user: No not now. Now find me a round trip flight to there

system: From where do you want to depart and on what day? When are you returning?

user: I'm starting my travel on March 1st from Chi-town and returning on March 14th

system: There are 3 flights. How about American Airlines that take off at 4:35 pm. This flight has a layover. The returning flight takes off at 2:55 am. The ticket cost is $514

user: Is that a business or economy class ticket

system: This is an economy class seat

user: When will the flight reach at destination

system: The flight reaches at 6:30 pm

user: That's great. Thank you. That's all I need

system: Have a nice day