You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from HOU to PHL, can you help me in booking?

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

USER: Sure, my planned travel dates are Sept 23 and Sept 25.

ASSISTANT: Do you have any other requirements?

USER: Actually, I need a direct flight.

ASSISTANT: Let me know your name please.

USER: Myself Virginia Baker.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Most welcome.