You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please check for the flights for my business trip from SEA to PHL?

ASSISTANT: May I know your desired travel dates please?

USER: My journey dates are from Aug 15th to Aug 17th.

ASSISTANT: Do you have any specifications?

USER: I need an economy class flight. I was looking for a direct flight.

ASSISTANT: May I know your name please?

USER: My name is Debra White.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for opting us.