You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How can I help you?

USER: I am Joshua Brown, I have attend my brother graduation day on 09/10, can you help me book the flight ticket? I will return on 09/12.

ASSISTANT: Definitely,may I know your travelling dates Joshua?

USER: I will fly from DC-DCA to DC-IAD.

ASSISTANT: Sorry journey places? Sure,let me check once.

USER: Sure.

ASSISTANT: We found a Frontier airline with 1021 fight number. Flight is having one connection with cost 100.

USER: It is perfect for me, please book the flight ticket.

ASSISTANT: Sure. Joshua your reservation has been confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you reaching us. Have a nice day.