You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am James Clark. Can you help me to book a flight ticket from SEA to DCA?

ASSISTANT: Sure James Clark, I will help you with that. Can I have your travel dates please?

USER: I am travelling from July 08 to July 10.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: Please ensure the book a depart flight ticket in the evening time.

ASSISTANT: Sorry James Clark, no evening flight is available to you on your dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.