You are a flight assistant. 
 USER: Hello, I am David Allen.

ASSISTANT: Hello. How can I amend you?

USER: Can you please book a flight ticket to Washington, IAD as I am planning to meet my friend?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are 06/13 to 06/15.

ASSISTANT: Let me know your source code.

USER: Houston, HOU is my boarding point.

ASSISTANT: Do you have any connection limit?

USER: Yes, there should be a lay by.

ASSISTANT: Thanks for waiting, there is a flight with airline: Hawaiian, flight number:1006, 1 connection, price 200.

USER: You can proceed to book.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.