You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: My name is Eric Anderson, I want to book a flight to Washington to meet my brother. Can you book a connecting flight for me?

ASSISTANT: Sure, I am ready to help you with that. Can I have your travel dates please?

USER: I will travel on May 14 and return on May 16.

ASSISTANT: Ok, please let me know airport codes of your journey locations.

USER: My source point is LAX and my destination is DCA.

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

USER: Yes, I want my departure flight in evening.

ASSISTANT: Sorry Eric Anderson, no evening flight is available to you on your dates.

USER: Ok, thank you for the information.

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