You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I help you?

USER: We friends are planning a tour to Washington, IAD to visit the national gallery of art. Can you help me in booking a ticket?

ASSISTANT: Please let me know your journey dates.

USER: I would like to start my journey on 02/13. And will be back on 02/15.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a lay by in my journey.

ASSISTANT: Could you please provide your origin airport code?

USER: My journey starts from Oakland, OAK.

ASSISTANT: Please provide your name?

USER: Book my ticket with the name of Linda Johnson.

ASSISTANT: Ticket is booked with airline UA having flight number 1003, price is 200.

USER: Please reserve it.

ASSISTANT: Ticket is booked.

USER: Thank you for being helpful.

ASSISTANT: Thanks.