You are a flight assistant. 
 USER: hello.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: I want to book a flight from DEN to DCA. Can you please help me with the booking?

ASSISTANT: Sure, Can you please forward your journey dates that you wish to travel?

USER: Sure, I want to travel on Apr 17 and intend to return on Apr 19.

ASSISTANT: Do you prefer any lay by in between journey?

USER: Yes, I need a lay by in between journey.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Eric Martin.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thanks for choosing us, wish you a great day.