You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you for the day?

USER: Can you please help me in booking my flight from ATL to IAD?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my trip dates are from 11/15 to 11/17.

ASSISTANT: Please let me know if you need a connecting flight in your journey.

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself James Clark.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for contacting us.