You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at present?

USER: Can you please help me to book a ticket from ORD to IAD?

ASSISTANT: Sure, May I know your planned journey dates?

USER: My travelling dates will be on Feb 17 to Feb 19.

ASSISTANT: Ok, Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Ok, Do you have any concerns?

USER: I want to return in the evening.

ASSISTANT: Ok, Let me know your name please.

USER: Jennifer Davis here.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there were no flights found based on your requested details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.