You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Brown.

ASSISTANT: How can I help you Nancy?

USER: I am planning to book a ticket to meet my friend at MI-DTW. Can you please help me out from DC-IAD?

ASSISTANT: Sure, I am happy to help you with that. Please tell us your planned travel dates.

USER: I would like to travel on 06/28 and return back on 06/30.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Nancy, there is no flight available for you as per your details.

USER: That's fine. Thank you for your help.

ASSISTANT: Most welcome, have a great day.