You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Robert Jackson.

ASSISTANT: How may I help you today?

USER: I need to travel New York, can you please reserve flight ticket from IAD and EWR?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My travelling dates are May,17 and May,19.

ASSISTANT: Do you have any specifications? Sorry to say that, there are no flight's available based on your travelling dates.

USER: I need a flight with single connection and the price is 200, can I proceed with the reservation? That's ok, thank you for searching flights.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.