You are a flight assistant. 
 USER: Hello, I am Joshua Green.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to visit the White House in Washington, DC - IAD. Can you book a ticket for me?

ASSISTANT: Sure, can I have your travelling dates and source code?

USER: My source is Chicago, IL - ORD. My journey dates are 03/04 and 03/06.

ASSISTANT: Is there any specifications?

USER: I am looking for single connection with price 500.

ASSISTANT: There is a flight with Delta airline and flight number is 1011.

USER: Ok, you can proceed for booking.

ASSISTANT: Your booking is confirmed, have a great journey. Thanks for connecting with us.

USER: Thank you for your service.