You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, please let me know, what kind of service your looking for?

USER: Can you please help me in booking my flight ticket from LAX to PHL?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Sept 19 and Sept 21.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Myself Angela Turner.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need direct flight.

ASSISTANT: May I know your class preferences?

USER: No, class preference.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, thanks for checking.

ASSISTANT: Thank you for opting us.