You are a flight assistant. 
 USER: Hi. I am Nicholas Young.

ASSISTANT: Hello, how may I assist you today?

USER: As, I am a food lover, I want to visit the food festival which is going to held at chestnut hill ultimate foodie in Philadelphia, PHL. Can you help me to book a flight from Las Vegas, LAS?

ASSISTANT: May I know your planned date of journey?

USER: My planned journey dates are Sept 22 and 24.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Can you please help me with the airport codes?

USER: I have already mentioned above.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the afternoon time and return in the evening time.

ASSISTANT: Please allow me a moment to check.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say there are no flights found on this route.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.