You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket from PHL to SEA?

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

USER: Sure, my travel dates are from July 05 to July 07.

ASSISTANT: Do you have any other requirements?

USER: I would prefer direct flight for my trip.

ASSISTANT: Can I know your name please?

USER: Myself Kevin Moore.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Most welcome.