You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can Serve you at this moment?

USER: I want the flight with 1 connection limit.Can you please help me out?

ASSISTANT: Ok, May I know your source code?

USER: The source code is form DC-IAD.

ASSISTANT: Can you please provide me your source date?

USER: The source date is 12/07.

ASSISTANT: May I know your destination code and date?

USER: The destination airport code is MN-MSP on 12/09.

ASSISTANT: May I know your name?

USER: My name is Mary Lee.

ASSISTANT: Here is a flight with price 300 and connection limit 1.

USER: Ok, please book the ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.