You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I have planned to book a plane ticket from JFK to DCA, can you assist me?

ASSISTANT: Sure, could you please let me know your dates of journey?

USER: My preferred dates are Jan 2nd and Jan 4th.

ASSISTANT: May I know your good name please?

USER: Gregory Evans.

ASSISTANT: Are you looking for any other specifications from my side please?

USER: I need to depart in evening time.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: I found a connecting flight of fare 100 with the AA airline, shall I proceed with this ticket booking?

USER: Sorry, please change my depart time to afternoon.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: No problem, thank you for searching.

ASSISTANT: You are welcome.