You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: I am Nicholas Young. I need to book a flight ticket from EWR to IAD, Can you please help me for booking?

ASSISTANT: Sure, kindly please share your travelling dates.

USER: I would like to travel on 04/17 to return on 04/19.

ASSISTANT: Ok, may I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to inform you that, there were no flights found based on your request.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.