You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to spend my free time with my family members in Washington, will you please help me to get flight ticket?

ASSISTANT: Sure, I will help you. May I know the travelling dates?

USER: Sure, I will go on 06/20 and return on 06/22.

ASSISTANT: May I know the destination airport code?

USER: Sure, book my journey tickets from SFO to DCA.

ASSISTANT: Ok, may I know your name for booking the flight ticket?

USER: Sure, I am Andrew Turner.

ASSISTANT: Thank you for your information.

USER: Welcome.

ASSISTANT: Based on your requirement, there is a flight 1016 has the price 100.Can I proceed?

USER: Ok, please book it.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you for your great service.

ASSISTANT: You are welcome, have a nice day.