You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: I am Samantha Roberts. I am planning to book a ticket to attend a meeting at EWR. Can you please help me out from DCA?

ASSISTANT: Sure, may I know on which dates would you like to book your flight ticket?

USER: I would like to travel on Mar 29 and return back on Mar 31.

ASSISTANT: Do you prefer any halt in between journey?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: OK, please wait for a while. Sorry we did not find any flights matching your journey dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for approaching us.