You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today at this moment?

USER: Can you aid me to book flight ticket from EWR to DCA?

ASSISTANT: Sure, I am happy to assist you in booking a flight ticket. May I know your planned travel dates please?

USER: My trip dates are Aug 12 and Aug 14.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight which depart in the evening.

ASSISTANT: We are glad to inform you that we have found a flight with an United airline of flight 1011 in an economy class with single connection. Can I confirm your booking?

USER: Please confirm it.

ASSISTANT: To confirm your booking, can I know your name please?

USER: I am Emily Perez.

ASSISTANT: Your seat has been reserved.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.