Given the task definition and input, reply with output. In this task, the input is a set of dialogues between a user and an assistant. You need to find the dialogue that is basically a response given to a question or an aspect of the user.

Have a nice day.
bye!
Shanghai is the biggest city in China and one of the world's largest cities. it had about 24,000,000 people in2017. It is is so big and important that it is a special province level city " municipality" like Bejing, Tanjin, and Chongquing. Right now, it is the biggest port int he world.
Hello what can you tell me about Shanghai?
Sure what can you tell me?
Shanghai is the biggest city in China and one of the world's largest cities. it had about 24,000,000 people in2017. It is is so big and important that it is a special province level city " municipality" like Bejing, Tanjin, and Chongquing. Right now, it is the biggest port int he world.