You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me with flight ticket booking from ATL to IAD?

ASSISTANT: Sure, may I know your planned trip dates?

USER: Thank you. I have planned my travel dates as Aug 19 and Aug 21.

ASSISTANT: Do you have any connection limit?

USER: I am looking for direct flight as it is an emergency trip. So please make sure that.

ASSISTANT: Is there any class preference?

USER: No, I am ok with any class.

ASSISTANT: Do you have any other specifications?

USER: No, I do not have any other specifications.

ASSISTANT: Please forward your name.

USER: Sure, myself Debra Carter.

ASSISTANT: Sorry to inform you that, there are no flights found on your specified trip dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for availing us.

USER: Most welcome.