You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: Can you please assist me in booking a flight ticket from DFW to EWR to attend a flower festival?

ASSISTANT: Sure, May I know your travelling dates?

USER: My planned journey dates are from Mar 15 to Mar 17.

ASSISTANT: Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Brian Nelson.

ASSISTANT: Sorry, there are no flights found with your data.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you.