You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Please help me out in booking the ticket from PHL to JFK.

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: My trip dates will be Mar 28 to Mar 30.

ASSISTANT: Ok, may I know your name?

USER: Frank Jackson is my name.

ASSISTANT: Is there any other requirements?

USER: I need a direct flight.

ASSISTANT: Ok, wait for a minute.

USER: OK.

ASSISTANT: Sorry to say that, there are no flights available based on your journey dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.