You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you for the day?

USER: Find a flight for me from IAD to ATL.

ASSISTANT: Sure, I will help you with that. May I know your travelling dates?

USER: Ok, my journey dates are from June 07 to 09.

ASSISTANT: Do you have any class preference?

USER: No, I would like to depart in the evening.

ASSISTANT: Can I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Sorry to say that, there is no direct flight on this route as per your travel dates.

USER: It's ok, thank you.

ASSISTANT: May I know your name please?

USER: Ok, I am Ashley Walker.

ASSISTANT: Thank you for giving the information,.

USER: Welcome.

ASSISTANT: Have a great day.