You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how my I assist you today?

USER: I need to travel DCA and JFK, can you please reserve flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Apr,28 and Apr,30.

ASSISTANT: Do you have any limits on number of connections?

USER: I prefer one connecting flight.

ASSISTANT: Do you have any specifications on your journey?

USER: My return time should be in the morning.

ASSISTANT: No flights are available on your specified dates. May I know your name for the booking process?

USER: Myself Daniel Mitchell.

ASSISTANT: Welcome, thank you for reaching us.

USER: That's ok, thank you for the information.

ASSISTANT: Most welcome.