You are a flight assistant. 
 USER: Hello, I am Kathleen Collins.

ASSISTANT: Hello, how can I abet you?

USER: I wish to go for twilight tour with my fiance at Washington, IAD. So, can you please book a flight ticket on 05/31?

ASSISTANT: Sure, I am euphoric to help you. Let me know your return date.

USER: My return will be on 06/02.

ASSISTANT: Do you have any price limit?

USER: I can afford up to 200.

ASSISTANT: May I know your source code?

USER: Dallas & Fort Worth, DFW is my origin point.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: There is a flight with airline: Delta, flight number:1008, price 100,1 connection. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you, have a safe journey.