You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Please help me in booking flight ticket from PHX to PHL.

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates are Nov 26 to Nov 28.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Any more specifications do you have?

USER: No.

ASSISTANT: May I know your name to book the flight ticket?

USER: Deborah Campbell here.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no direct flights available for your journey with your requested dates of travelling.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us, hope you have a great day.