You are a flight assistant. 
 USER: Hello.

ASSISTANT: How can I provide assistance to you?

USER: Can you help me to book a flight ticket from PHL to LAS?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: My travelling dates are 01 to 03 of Sep.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a direct flight.

ASSISTANT: May I know your name please?

USER: I am Steven Phillips.

ASSISTANT: No flights found as per your preferences.

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

ASSISTANT: Thank you for choosing us.