You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello'. How may I aid you?

USER: Could you please help me with booking a flight ticket from DFW to Washington, IAD?

ASSISTANT: Sure, I am here to help you out. Can you please share your travel dates?

USER: My planned travel dates are from Aug 15 to Aug 17.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection limit.

ASSISTANT: Do you have any other requirements?

USER: I need to book my ticket in business class and it should be in Normal-cost airlines.

ASSISTANT: Ok, please share your name to proceed further.

USER: Sure, myself Kevin Turner.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.