You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that you are expecting from my side?

USER: I would like to visit Philadelphia, Can you help me for booking a flight ticket from PHL to JFK?

ASSISTANT: Sure, I will help you and can you please let me know your planned travel dates?

USER: My travelling dates are May 18 and May 20.

ASSISTANT: Do you have any airline preference?

USER: I prefer normal cost airline.

ASSISTANT: Do you need a direct flight or connecting flight?

USER: I need a direct flight in my journey.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: May I know your name for documentation purpose?

USER: My name is Gregory Nelson.

ASSISTANT: Sorry to inform you that there is no flight obtained on your travel dates and requirements to book a flight ticket.

USER: That's ok, thank you for checking.

ASSISTANT: You are most welcome and thank you for reaching our agency.

USER: Welcome.