You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am planning to go New York to meet my niece, can you help me to book a flight ticket from OAK to JFK?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Ok, I want to travel on 12/20 and return on 12/22.

ASSISTANT: Can I know your name please?

USER: Ok, my name is Dennis Lee.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: It's ok, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1020.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.